An electric field is an invisible field of force created by the attraction and repulsion of electric charges (the cause of electric flow) and is measured in volts per meter (V/m). With increasing distance from the field source, the electric field's intensity decreases.
Electrostatics Force :Electrostatic forces are attractive or repulsive forces between particles that have already been created by their respective electric charges. The electrical force between stationary charged substances is generally known as the electrostatic force.
An electric field is an area around a charged object where the electric force of the object acts on other charged objects. Electric fields weaken the further they are from the charge. The electric field is invisible.
You see, electrically charged particles like protons and electrons actually have invisible force fields around them.
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what is dark matter? where does it reside in our galaxy? what makes dark matter and dark energy so mysterious and so important?
Dark matter is a hypothetical form of matter that is thought to make up approximately 85% of the total matter in the universe.
What is dark matter and where does it reside?
It is called "dark" because it does not emit, absorb, or reflect any electromagnetic radiation, making it invisible to telescopes.
It is believed that dark matter resides in the halo of our galaxy, which is a large, spherical region that surrounds the galaxy. It is also thought to be present in galaxy clusters and in the large-scale structure of the universe.
Dark matter and dark energy are mysterious because they cannot be directly observed through telescopes or other instruments. They are detected only through their gravitational effects on visible matter, such as the rotation of galaxies and the expansion of the universe.
Dark matter and dark energy are important because they play a crucial role in the formation and evolution of structure in the universe. The gravitational pull of dark matter is thought to be responsible for the formation of galaxies and galaxy clusters, while dark energy is thought to be driving the accelerated expansion of the universe.
Understanding the properties and behavior of dark matter and dark energy is a major focus of current research in cosmology and astrophysics.
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The speed of a moving bullet can be determined by allowing the bullet to pass through two rotating paper disks mounted a distance 99 cm apart on the same axle. From the angular displacement 26° of the two bullet holes in the disks and the rotational speed 407 rev / min of the disks, we can determine the speed of the bullet.
What is the speed of the bullet?
Answer in units of m/s.
Answer:
To calculate the speed of the bullet, we can use the equation v = rωθ, where r is the distance between the disks, ω is the angular speed, and θ is the angular displacement of the bullet holes. In this case, v = 99 cm(2π/60)(26°/360) = 7.8 m/s. Therefore, the speed of the bullet is 7.8 m/s.
Which one of the forces in the diagram below must do negative work (W < 0) while acting
throughout the displacement shown? (Select all that apply.)
a. F1
b. F2
c. F3
d. F4
The forces F2 and F3 are the forces that would do a negative work.
What is negative work?We have to to note that the term work has to do with the product of the force and the distance of the object that has been covered in the direction of the force.
Now we know that we have the system of forces that is acting at a common point. We must note that the quadrant in which the force falls is what would tell us the kind of work that the force would have to do.
The forces that are in the negative quadrants are the ones that would do a negative work.
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A ball freely falling at 20 m/s will in the next second have a speed of ______. 30 m/s. What two units of measurement are necessary for describing speed?
Two units of measurement are necessary to describe the speed, are meter and second.
Speed of an object is nothing but the distance travelled by the object in unit time. A freely falling ball experience the acceleration due to gravity in the downward direction. The value of acceleration due to gravity of the earth is roughly taken as 10 m/s². If the initial speed is 20 m/s. and Time, t = 1 sec. Then speed in the next second will be v = u + at
v = 20 + 10 × 1
v = 30 m/s
Meter is the SI unit of length or distance and second is the SI unit of time.
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QUESTION 6 New cars have a crumple zone to help minimise injuries during accidents. In addition seat belts, air bags and padded interiors can reduce the chance of death or serious injury.
6.1 Use principles in Physics to explain how air bags can reduce the chance of death or injury. (3)
Using principles in Physics the way in which air bags can reduce the chance of death or injury is that the airbag increases the time over which the velocity of the head changes so that the acceleration is reduced, and thus the force is reduced.
What is an Airbag?This is referred to as a vehicle occupant-restraint system using a bag designed to inflate extremely quickly, then quickly deflate during a collision.
The gas in the bag can only leave at a certain rate which makes it deflates slowly, and the time duration of the deceleration increases which therefore leads to the force being reduced during a collission and reduces the risk of injury.
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Charge of uniform density (80 nC/m3) is distributed throughout a hollow cylindrical region formed by two coaxial cylindrical surfaces of radii 1. 0 mm and 3. 0 mm. Determine the magnitude of the electric field at a point which is 4. 0 mm from the symmetry axis. Group of answer choices
The magnitude of the electric field when it is located at a distance of 4.0 mm from the symmetry axis is 4.5 N/C
What is magnitude?The absolute or relative direction or size of an object's motion in the sense of motion can be used to define magnitude. It is extensively utilized to convey something's size or scope. In physics, the term "magnitude" typically means "distance" or "quantity."
According to the question,The charge density = 80 nC/m3.
The inner radius, r' = 1 mm
The outer radius, r'' = 3 mm
distance, r = 4 mm
The linear charge density is given by
λ = ρ π ( r"²- r²).
λ = 80 ×10⁻⁹ × 3.14 × 10 ⁻⁶× (9-1).
λ = 2 × . 10⁻¹²
The electric field is given by,
E = λ/4πe0r.
E = 4.5 N/C.
Therefore, the magnitude of the electric field at a point that is 4.0 mm from the symmetry axis is found to be 4.5 N/C.
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the intensity of the sun's rays do not fall uniformly across earth's surface. this is driven, in large part, by:
The intensity of the rays of sun does not fall uniformly across the surface of the earth. In large part, this is driven by latitude and season.
There is a relationship between latitude and temperature across the world, as typically temperatures are warmer approaching the Equator while cooler approaching the Poles. There exist variations, though, as other factors such as ocean currents, elevation, and precipitation affect climate patterns.
As a result latitude and season make the intestity of the sun ray's to fall nonuniformly all around the globe.
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an electron moves with a constant horizontal velocity of 3.0 x 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 17.0 cm horizontally and 40.0 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)
The constant vertical acceleration provided by the deflector is a = 1.11 * 10^6 m/s^2.
What is meant by acceleration?The rate of change of velocity is called acceleration. Acceleration means that the speed is changing, but not always.
y = vi*t + (1/2)at^2
Where y is vertical displacement, vi is initial vertical velocity, t is time of travel, and a is the constant acceleration.
So, y = (1/2)at^2
Given, vertical displacement of the electron (y = 40.0 cm)
x = vt
x is the horizontal displacement and v is horizontal velocity.
So, t = x/v
t = (17.0 cm) / (3.0 x 106 m/s) = 5.67 x 10^-8 s
y = (1/2)(a)(t)^2
a = 2y/t^2
a = 2(40.0 cm) / (5.67 x 10^-8 s)^2
So, the acceleration provided by the deflector is a = 1.11 * 10^6 m/s^2.
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two particles, an electron and a proton, are initially at rest in a uniform electric field of magnitude 468 n/c. if the particles are free to move, what are their speeds (in m/s) after 48.8 ns?
A homogeneous electrostatic force of strength 564 N/C is initially present around two substances, an electrons and a proton. if the atoms and molecules are unrestrained.
When both a proton and an electron are inserted into an electric?According to our inquiry, a electron as well as a proton will attract one another with a electrical force of equal strength when they are placed in a magnetic field because of their opposing polarities. However, because of their opposing charges, the force will act in the opposite direction.
Are neutrons simply the sum of protons and electrons?Proton, electron, and an antineutrino do not make up a neutron. These particles are simply byproducts of its decay. One up quark, two down quarks, and numerous "intermediary particles" known as gluons, that carry a interaction between the quarks, make up a neutron.
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Four cannonballs, each with mass M and initial
velocity V, are fired from a cannon at different
angles relative to the Earth. Neglecting air friction,
which angular direction of the cannon produces the
greatest projectile height?
1. 70 degrees
2. 20 degrees
3. 45 degrees
4. 90 degrees
4. 90 degrees angular direction of the cannon produces the greatest projectile height.
which angular direction of the cannon produces the greatest projectile height?The angular direction of the cannon that produces the greatest projectile height is 90 degrees. This is because at 90 degrees, the cannonball has the greatest initial velocity component in the vertical direction, and the least initial velocity component in the horizontal direction.With no air friction, the vertical component of velocity will remain constant and the horizontal component of velocity will be zero, resulting in the cannonball traveling in a parabolic arc with maximum height at the top. Therefore, the ball fired at 90 degrees will reach the greatest height. The cannonball fired at 70 degrees will also have a significant vertical component of velocity, but its horizontal component will be greater than that of the 90 degree shot, resulting in a lower maximum height.The cannonball fired at 20 degrees will have a small vertical component and a large horizontal component resulting in the trajectory being relatively flat with a much lower maximum height.The cannonball fired at 45 degrees will have an equal vertical and horizontal component of velocity, resulting in a trajectory somewhere in between the 90 and 20 degree shots, but with a lower maximum height than the 90 degree shot.To learn more about The angular direction of the cannon refer to:
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why can you not use the second kinematic equation to solve for the height of an object thrown upward
The second kinematic equation (vf = vi + at) is used to calculate the final velocity of an object based on its initial velocity and acceleration.
It cannot be used to calculate the height of an object since it does not take into account the vertical displacement of the object. To calculate the height of an object, you must use the first kinematic equation (y = yi + vi*t + 1/2*a*t^2).
The study of motion in a system of bodies is called kinematics, which does not directly take into account the forces or potential fields influencing the motion. In other terms, kinematics investigates the distribution of momentum and energy among interacting bodies.
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Which of the following happens to an object in free fall right after it’s thrown upwards?
(Select all that apply.)
a. Increasing Ug
b. Decreasing Ug
c. Decreasing K
d. Increasing K
e. None of the above
The a body has been thrown upwards then there would be Decreasing Ug. Option B
What is free fall?If we are talking about the free fall, let us bear in mind that we have to know that this is the situation where the object would be falling freely under the influence of gravity.
We must note that the acceleration due to gravity would cause the object to move at a constant velocity as the object is falling freely on the surface of the earth. The value of the acceleration due to gravity would be decreasing as the object is moving upwards.
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if a ball is thrown straight up into the air, what is its acceleration as it moves upward? magnitude
The ball is thrown straight up into the air, its acceleration is -9.8 m/s²(upwards).
What is acceleration?A measure of how quickly an object's velocity changes is called acceleration. It has both a direction and a magnitude because it is a vector quantity. The magnitude of acceleration is measured in units of meters per second squared (m/s²) or feet per second squared (ft/s²). The direction of acceleration is the direction of the change in velocity.
Positive acceleration and negative acceleration are the two different types of acceleration. Positive acceleration occurs when an object's speed increases, and negative acceleration occurs when an object's speed decreases.
As the ball is thrown straight up into the air, it initially accelerates upward due to the force of the throw. As it moves upward, it eventually reaches its maximum height and begins to fall back down to the ground.
The acceleration of the ball as it moves upward is equal to the force of gravity acting on it, which is 9.8 m/s², but in the opposite direction. The direction of acceleration is opposite to the direction of velocity, so the acceleration is upward, but negative. 9.8 m/s² is the magnitude of the acceleration.
So, as the ball is thrown straight up into the air, its acceleration is -9.8 m/s² (upwards).
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consider a projectile fired vertically in a constant gravitational field. for the same initial velocities, find the times required for the projectile to reach its maximum height (a) with no resisting force and (b) for a resisting force proportional to the instantaneous velocity of the projectile. (c) show that the result in (a) can be recovered from the result in (b).
Compare the amount of time needed is for projectile to go from its initial velocity to its highest point. (A) for a resistive force of zero.
What types of things are velocities?A number called velocity describes the speed and direction of a point's motion. Because it has both direction and magnitude, velocity is referred to as a linear momentum and cannot be fully expressed in numerical terms, unlike time or length, that are scalar numbers.
How is speed measured?According to the equation v = s/t, velocity (v) is indeed a vector quantity which quantifies displacement (and change in position, s), over change in time (t).
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Two spheres are launched horizontally from a 1.2 m high table. Sphere A is launched with an initial speed of 3.5 m/s. Sphere B is launched with an initial speed of 1.5 m/s.
What is the time for the sphere A to hit the floor?
What is the time for the sphere B to hit the floor?
What is the distance that sphere A travels from the edge of the table?
What is the distance that sphere B travels from the edge of the table?
(a) The time for the sphere A to hit the floor is 0.5 second.
(b) The time for the sphere B to hit the floor is 0.5 second
(c) The distance travelled by sphere A from the edge of the table is 1.75 m.
(d) The distance travelled by sphere B from the edge of the table is 0.75 m.
What is the time of motion of sphere A?
The time of motion of sphere A is calculated by applying the following formula.
t = √ ( 2h / g )
where;
h is the height of fall of sphere Ag is acceleration due to gravityt = √ ( 2 x 1.2 / 9.8 )
t = 0.5 second
The time of motion of sphere B is calculated as;
t = √ ( 2 x 1.2 / 9.8 )
t = 0.5 second
The distance travelled by sphere A from the edge of the table is calculated as;
d = vt
where;
v is the speed of sphere At is the time of motiond = 3.5 m/s x 0.5 s
d = 1.75 m
The distance travelled by sphere B from the edge of the table is calculated as;
d = 1.5 m/s x 0.5 s
d = 0.75 m
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A spring will never do negative work as it moves toward from equilibrium.
a. Tue
b. False
By what factor does the kinetic energy of a car change when its speed is tripled?
(A) no change at all
(B)factor of 3
(C) factor of 6
(D) factor of 9
By a factor of 9, the Kinetic energy rises.
What happens to kinetic energy of an object if its speed is tripled?The formula for kinetic energy is 1/2 m b square. Half a metre will be used if speed is to be tripled. Divide equation 2 by 19 by 2 m b square by 9, and the resulting energy is 9 tens points. Thus, if an object's speed is tripled, its kinetic energy increases by a factor of nine.According to K=12mv2, kinetic energy. Now, if the velocity v is decreased to 13 percent of the initial velocity while maintaining the same mass, the kinetic energy is decreased to 19 percent of its initial value (since kinetic energy is directly proportional to the square of velocity). Q.As a result, if a body's momentum is tripled, its kinetic energy will increase by a factor of nine.To learn more about Kinetic energy refer to:
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A car drives 500 m to the East and then 200 m back to the West.
What is the objects total distance
The frequency of a wave is the wide variety of oscillations or cycles according to unit of time, commonly measured in hertz (Hz). The objects total distance is 700 m.
What is wavelength?The wavelength is the distance between consecutive peaks or troughs in a wave, normally measured in meters. The velocity of a wave is the distance it travels consistent with unit of time, generally measured in meters in keeping with 2d. The connection among frequency, wavelength, and velocity is defined by way of the equation: velocity = frequency x wavelength.
This courting is referred to as the wave equation. As frequency increases, wavelength decreases and as frequency decreases, wavelength will increase.
The total distance of the object is
500 m + 200 m
= 700 m.
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an airplane starts from a brakes locked position and accelerates down the runway at 11 ft/s2. it reaches takeoff airspeed at 275 ft/s. what is the time for the airplane to reach takeoff speed?
The aircraft takes off from the runway with its brakes locked. At such a speed of 200 fps, the aircraft takes off. Find out when the plane will arrive.
How quickly do airplanes take off and land?
The ground run can be a little bit longer if a decreased power takeoff is being performed. Prior to takeoff, a typical commercial aircraft accelerates to a speed of 120–140 knots. It will need a strong sustained acceleration to complete it in 30 to 35 seconds. Pilots watch for this as they roll out for takeoff.
What is the total vertical force acting on the aircraft when it takes off?
When a result, there is no net vertical force acting on the aircraft as it takes off. When a result, there is no net vertical force acting on the aircraft as it takes off. The net vertical force acting on the aircraft as it ascends is therefore 65000 Newton.
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calculate the total potential energy, in btu, of an object that is 20 ft below a datum level at a location where g
The total potential energy of an object that is 20 ft below a datum level at a location where g = 31.7 ft/s², and which has a mass of 100 lbm is 2.53 Btu.
Potential energy is the power that an object can store as a result of its position in relation to other objects, internal tensions, electric charge, or other circumstances. Potential energy is denoted mathematically as:
PE = m x g x h
Where,
m = mass of the object (kg)
g = acceleration due gravity
h = height
We must calculate an object's total potential energy in British thermal units (Btu)
Hence,
PE = 100 x 31.7 x 20 (1 / 25037) btu
= 2.5322 btu
The question is incomplete, it should be:
Calculate the total potential energy, in Btu, of an object that is 20 ft below a datum level at a location where g = 31.7 ft/s², and which has a mass of 100 lbm.
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trials with which two sets of experimental conditions would allow an experimenter to determine the effect of increasing drop height upon the force experienced by the egg?
Size: large, drop height: 1 metre, surface: hard floor, and size: large, drop height: 10 metres, surface: hard floor are the two trials that would allow a researcher to examine the influence of increasing drop height upon the force experienced by the egg.
Since the goal of the experiment is to understand how a difference in mass (or size) can impact the force that the egg experiences, It means that the other points of measurement should remain the same and only the size should change. Therefore, the Trials that would enable an experimenter to ascertain the impact of increasing drop height on the force felt by the egg under two sets of experimental conditions are size: large, drop height: 1 metre, and surface: hard.
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a ball player catches a ball 3.46 ss after throwing it vertically upward. part a with what speed did he throw it?
The initial velocity of the ball would be 14.7 m/s.
What is initial velocity?Initial velocity is the speed and direction of an object at the start of its motion. It is a vector quantity, meaning it has both magnitude (the speed) and direction. Initial velocity is usually denoted by the letter v, with an arrow above it to indicate its direction.
The speed with which the ball player threw the ball can be calculated using the equation v = √2gh,
where v is the initial velocity,
g is the acceleration due to gravity (9.8 m/s2), and
h is the height from which the ball was thrown.
In this case, h = 3.46 s, so the initial velocity of the ball would be v = √2(9.8)(3.46) = 14.7 m/s.
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a child is riding in a wagon. what reference point might have been used if an observer said the child was not moving?
If an observer said the child was not moving, the reference point might have been used is persons in the wagon. The conclusion is from the concept of relative motion.
What is relative motion?The relative motion is the motion of an object depending on frames of reference. The motion is relative and not absolute depending on frames of reference used in that motion.
For example, you are in a car moving and see people walking on the side of the road. A person who also in a car will say you are not moving. But, the people on the side of the road will say that you are moving.
A child is riding in a wagon. We know that there are some people in the wagon.
An observer said that the child is not moving. Find reference point might have been used!
Based on the explanation above, the people in the wagon see the child not moving. Otherwise for people around, the child is moving.
Thus, the reference point have been used is people in the wagon.
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A 1.0 kg toy
car is released at the top of a frictionless track on the left and rolls off of the track
from its right side ramp. The car starts at a height of 0.80 m, goes through a 0.50 m diameter
loop, and exits the ramp at a height of 0.25 m.
L
0.80 m
B
0.50 m
0.25 m
The 0.80 m is the starting height of the car at the top of a frictionless track.
What is frictionless?
Frictionless is a type of technology that enables activities or processes to occur without resistance or difficulty. It is used in a variety of fields, from banking to digital marketing, and it generally involves the use of software or other digital tools that simplify complex tasks and make them easier to accomplish. With frictionless technology, users are able to perform tasks faster, more securely and with minimal effort. For example, in banking, frictionless technology is used to enable customers to make payments or transfers without having to enter their credentials or payment information each time. Similarly, in digital marketing, frictionless technology is used to enable customers to make purchases without having to enter their billing information multiple times.
The 0.50 m is the diameter of the loop that the car goes through. The 0.25 m is the height of the car when it exits the ramp.
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what term is used to describe the continuous heating and cooling of magma within the mantle
The term is used to describe the continuous heating and cooling of magma within the mantle Convection currents.
What results in the mantle's convection currents?The heat from the earth's core and the mantle causes convection currents to form in the mantle. Mantle material rises in hot columns slowly. The hotter material spreads out at the top of the asthenosphere and pushes the cooler material aside. The mantle receives this cooler substance once more.
Where is and what the mantle is?Earth's interior is made up primarily of the mantle, which is solid. The Earth's thin outer layer, the crust, and its dense, extremely hot core are separated by the mantle. The mantle makes up a staggering 84% of the total volume of the Earth and is roughly 2,900 kilometers (1,802 miles) thick.
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When the mantle moves, heat is transferred from the blazing core to the brittle lithosphere, a process known as mantle convection.
What does the term "mantle convection" mean? Convection currents.Mantle Convection.When the mantle moves, heat is transferred from the blazing core to the brittle lithosphere, a process known as mantle convection.The temperature of the mantle lowers over extended periods of time as it is heated from below and cooled from above.To the convection of the mantle, all these components are present.In the Earth's mantle, convection currents have been found.The mantle's convection circulation is caused by heated mantle material ascending from the mantle's depths while cooler mantle material sinking.The shifting of the Earth's crustal plates is assumed to be caused by this kind of circulation.Convection, an advective heat-transfer mechanism, is the term used to describe the mantle's large-scale motion, in which hot material rises in some locations while colder material sinks in others.To learn more about "mantle convection" refer
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A 120 kg skydiver jumped out of a plane 3500m in the air. Determine the Gravitational potential energy of the skydiver
The gravitational potential energy of the skydiver is 4.2 × 10⁷.
Define Gravitational potential energy of the skydiverThe amount of work done on an object is directly proportional to the force applied on the object and the distance it moves in the direction of that force. The speed of an object does not directly affect the amount of work done on it. However, if the force and distance are constant, the work done on an object will be greater if it is moving at a higher speed because the object will have greater kinetic energy.
In addition, the time taken to do the same amount of work on an object will be less if it is moving at a higher speed, as the work is done over a shorter period of time.
The required details for gravitational in given paragraph
Joules (120 x 9.8 x 3500)
= 42,000,000 or 4.2 × 10⁷
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from smallest to largest, what is our cosmic address? 1 answer 1 earth 2 answer 2 solar system 3 answer 3 virgo supercluster 4 answer 4 choose... 5 answer 5 choose... 6 answer 6 choose...
Celestial bodies known as astronomical bodies are those that exist naturally in the cosmos. Earth, the solar system, the Milky Way galaxy, the local group, the Virgo cluster, and the cosmos are the things in order of smallest to biggest size.
How do heavenly objects work?
Celestial objects are celestial bodies that are naturally occuring and have a variety of dimensions, masses, distances, and atmospheres. The collection of other celestial objects in it contains the universe as its biggest member.
The neighborhood cluster of galaxies known as Virgo or the local super cluster is made up of a large number of galaxies. The cluster that houses the solar system is called the Milky Way galaxy.
The region of the galaxy that contains astronomical objects like the Sun, planets, stars, moon, etc. is known as the solar system. One of the planets in a solar system is Earth.
The universe, earth, solar system, milky way galaxy, local group, and Virgo cluster are therefore the astronomical objects in order of size.
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Note: The correct question would be as bellow,
Put the following astronomical objects and bodies in order from smallest to largest
1. solar system
2. Milky Way Galaxy
3. universe
4. Virgo cluster
5. Earth
6. Local Group
what are the (a) magnitude and (b) direction of the net electrostatic force on particle 4 due to the other three particles? all four particles are fixed in the xy plane, and q1
The magnitude and direction of the net electrostatic force on particle 4 due to the other three particles are 6.16×10^−24 N counterclockwise from the +x axis.
The individual force magnitudes are found using Eq., with SI units (soa=0.02 m) and k as in Eq., We use magnitude-angle notation (convenient if one uses a vector-capable calculator in polar mode), listing the forces due to +4.00q,+2.00q, and −2.00q
charges: (4.60×10^−24∠180 deg )+(2.30×10^−24∠−90 deg )+
(1.02×10^−24∠−145 deg)= (6.16×10^−24 ∠−152 deg )
Therefore, the net force has magnitude of 6.16×10^−24 N.
The direction of the net force is at an angle of −152 deg or 208 deg
measured counterclockwise from the +x axis).
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The complete question is :
n Fig. what are the direction of the net electrostatic force on particle 4 due to the other three particles? All four particles are fixed in the xy plane, and q1 = - 3.20 × 10^-19C, q2 = + 3.20 × 10^-19 C, q3 = + 6.40 × 10^-19 C. d 3=2.00 cm.
Two cubical block A and B of ame dimenion but mae m and 3m are joined by a tring and are at equilibrium in water a hown in figure. Then
The density of block A and block B is 500 kg/m^3 and 1500 kg/m^3 respectively and the tension of the string is mg.
To find: The density of 2 masses and Tension of the string
What is meant by density ?
The measure of how densely a material is packed together is called density. As the mass per unit volume, it has that definition.Symbol for density: D or Formula for Density: Where is the density, m is the object's mass, and V is its volume, the equation is: = m/V.How much matter is confined within a volume is determined by density. For an identical size object, a dense object weighs more than a less dense one. A substance that is less dense than water will float on it; a substance that is denser will sink. Density equals mass per unit volume, or D = M / V, is the density equation.Mass of block A=m and Mass of block B= 3m.
Let V represent the volume of the block, ρ represents the water density, and ρ1 represent the density of block A.
For Block A, V ρ g = T+ V ρ1g……… (1) where T represents the string's tension.
For block B, V ρ g +T= 3V ρ1g……… (2)
Adding (1) and (2), we get
2V ρ g = 4V ρ1 g
ρ1 = ρ/2 = 1000/2 =500 Kg m^-3
As a result, block A's density is 500 kg/m^3, while block B's density is 1500 kg/m^3.
When we enter these values into (1), we get
V 2ρ1 g = T+ V ρ1g
T = V ρ1 g = mg
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solve: a 7.00-g bullet is fired into a ballistic pendulum whose bob has a mass of 0.950 kg. if the bob rises to a height of 22.0 cm, what was the initial speed of the bullet?
Answer: Intital speed of bullet is 286 m/s.
What is law of conservation of energy?
--The law of conservation of energy states that energy can neither be created nor be destroyed.
-- Although, it may be transformed from one form to another.
-- If you take all forms of energy into account, the total energy of an isolated system always remains constant.
According to law of conservation we have,
V1 = Vbu + Vb/ Vb( 2gh)^1/2
Mass of Bob is 0.950 Kv
Mass of bullet is 7g.
By solving above bw get intial speed of bullet is 289m/s.
What is energy ?
--In physics, energy is the quantitative property that is transferred to a body or to a physical system, recognizable in the performance of work and in the form of heat and light.
--Energy is a conserved quantity—the law of conservation of energy states that energy can be converted in form, but not created or destroyed.
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