To determine the height of a bridge above the water, a person drops a stone and measures the time it takes for it to hit the water. If the time is 2.3 s, what is the height of the bridge? Neglect air resistance.
a. 32 m
b. 52 m
c. 26 m
d. 14 m
e. 10 m
Answers
A stone dropped from a 26 m bridge, takes 2.3 s to reach the water.
A stone is dropped from a bridge and it experiences a uniformly accelerated rectilinear motion. It takes 2.3 s for the stone to reach the water.
We can calculate the height of the bridge, which is equal to the displacement of the stone, using the following kinematic equation.
[tex]s = ut + \frac{1}{2} a t^{2} = (0m/s)(2.3 s) + \frac{1}{2} (9.8m/s^{2} ) (2.3s)^{2} = 26 m[/tex]
where,
s: displacementu: initial speed (0 m/s)t: timea: acceleration due to gravity (9.8 m/s²)A stone dropped from a 26 m bridge, takes 2.3 s to reach the water.
Learn more: https://brainly.com/question/14851168
Related Questions
How many times larger is the mass of a proton compared to the mass of an electron?
Answers
Answer:
1.67262 × 10−27 kg, which is 1,836 times the mass of an electron.
describing motion with position distance vs time graphs
Answers
Answer:
In a position-time graph, the velocity of the moving object is represented by the slope, or steepness, of the graph line. If the graph line is horizontal, like the line after time = 5 seconds in Graph 2 in the Figure below, then the slope is zero and so is the velocity. The position of the object is not changing.
Explanation:
action reaction forces are in which one of newtons laws
Answers
Answer:
the third law
Explanation:
could u vote me brainliest plz? thx :)
What is a chemical reaction
Answers
Answer:
a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.
Explanation:
Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.
13. Which of the following would have NO momentum?
A person running
A table
A moving bus
Answers
Answer:
a table
Explanation:
Please type any energy transformation it will help a lot i would really appreciate it
prize: brainliest
Answers
Answer:
1. Electric generator
2. Using a battery powered torchlight
3. A fire(burning wood)
4. Electric lamp
5. Car using gas
Explanation:
find the difference between the actual values of the two sixes in the number 6036
Answers
Question 12 (1 point)
[04.01)
What must happen for liquid water to become water vapor? (1 point)
a
Ob
The water molecules must lose energy and stop moving.
The water molecules must exert less pressure on their container.
The water molecules must gain kinetic energy
The water molecules must lose heat and gain volume.
С
Od
Answers
Answer:
C
Explanation:
Reviewing old tests and quizzes will not help you determine what will be on a test because teachers don’t like to give students hints about what could be on future tests. Please select the best answer from the choices provided T or F
Answers
Answer: false
Explanation: on edg
It is false that reviewing old tests and quizzes will not help you determine what will be on a test because teachers don’t like to give students hints about what could be on future tests.
What is reviewing old tests?A test review verifies whether or not the modifications made to the code, data, or documentation are accurate.
In other words, it is an evaluation of the degree to which the stated goals have been attained that has been done at a set period.
Exam analysis might provide insights that can help you become a more self-sufficient learner.
You can improve your performance the next time you are tested by revising your strategy after reviewing returned examinations to learn why you made mistakes.
Thus, the given statement is false.
For more details regarding test preparations, visit:
https://brainly.com/question/19671752
#SPJ6
Select the correct answer.
Which statement is true?
Ο Α. .
The speed of sound in air is inversely proportional to the temperature of the air.
OB.
The speed of sound in air is directly proportional to the temperature of the air.
The speed of sound in air is twice the temperature of the air.
OD
The speed of sound in air is not affected by the temperature of the air.
Answers
what are 3 sources of heat inside earth?
Answers
1. Heat from when Earth was formed.
2. Frictional Heat, which is caused by heavier core material sinking to the center of the Earth.
3. Heat from the decay of elements that are radioactive.
+ 9. What force (in units of Newtons) is needed to give a 3.5 m/s" acceleration to a 1200 kg car?
Answers
Answer:
4200 Newtons
Explanation:
Force = mass x acceleration
1200 x 3.5 = 4200
What micro wave used for?
Answers
Answer:
Microwaves are widely used in modern technology, for example in point-to-point communication links, wireless networks, microwave radio relay networks, radar, satellite and spacecraft communication, medical diathermy and cancer treatment, remote sensing, radio astronomy, particle accelerators, spectroscopy, industria.
Explanation:
Two football players have a head-on collision and grab onto each other's uniforms. The 80
kg Pennridge Ram was moving at 3 m/s, while the 70 kg Souderton player was moving in
the opposite direction at 2.5 m/s. What is their final velocity after impact?
Answers
If a person is picking up a book with the force of 50 N and the gravity is pushing down with 15 N, what is the net force?
Answers
Answer:
[tex]the \: net \: force = \: 50 - 15 = 35.[/tex]
Answer:
Net force is going to be GREATER FORCE - LESS FORCE if they are working in opposite direction
so,
50N - 15N = 35N
Which of these warnings refers to a chemical property of the material?
Answers
Answer:
Please show the warning's
Explanation:
The warning refers to the chemical property of the material or object that is flammable.
What is Chemical Property?A chemical property is a feature that pertains to how a component, such as an ingredient or a compound, can alter as a result of a reaction. Due to bonding and other atomic structural characteristics, a substance develops these qualities as a result of its chemical identity.
Tactile or visual changes may occur in conjunction with chemical qualities. Chemical reactions commonly involve popping, fizzing, or the release of brilliant light. The emission of heat may also be a sign of a chemical reaction or chemical conversion that is taking place. Because the connections in the atomic structure are changing or breaking, these sensory clues appear.
Therefore, the warning refers to a chemical property of the material is flammable or combustible.
To know more about chemical property:
https://brainly.com/question/1935242
#SPJ6
A wave has a speed of 23 m/s and a frequency of 13 Hz. What is the wavelength?
Answers
Answer:
1.76923077 meters
Explanation:
wavelength is denoted by the letter lambda it is equal to the speed (v) of a wave in a medium (air , water, light) divided by frequency , equals wavelength . so wavelength = v/f or = 23m/s ÷13hz
Question 5
The head of a hammer is often made of steel. This makes the head heavy, which helps create a strong force for driving nails. Steel is also strong. The
head of a hammer must be strong to resist what force?
Answers
Answer:
the nails
Explanation:
The force of the nail pushing in the opposite direction. The correct option is option D among all the given options.
What is force?A force in physics is an effect that changes the velocity of a mass-moving object, causing it to accelerate from rest, for example. It is a vector quantity since it can be a push or even a pull and always has magnitude and direction.
The head of a hammer is often made of steel. This makes the head heavy, which helps create a strong force for driving nails. Steel is also strong. The head of a hammer must be strong to resist the force of the nail pushing in the opposite direction.
Therefore, the force of the nail pushing in the opposite direction. The correct option is option D.
To know more about force, here:
https://brainly.com/question/10292695
#SPJ6
Your question is incomplete but most probably your full question was,
The head of a hammer is often made of steel. This makes the head heavy, which helps create a strong force for driving nails. Steel is also strong. The head of a hammer must be strong to resist what force?
A The force of the air resistance on the moving hammer
B The force of the person using the hammer
C The force of gravity pulling down on the hammer
D The force of the nail pushing in the opposite direction
Find by means of a vector (quantity) diagram,
the resultant of two forces of 7N and 3N acting at
right angle to one another
solve
Answers
Answer:
which principle prevents a brach from abusing its power
Explanation:
When you are standing in a subway train and the train suddenly stops but your body continues to move forward. Which one of Newton's laws is this?
1st law
2nd law
3rd law
4th law
Answers
Answer:
A. 1st law.
Explanation:
Newton's first law of motion states that, an object or body will continue to be at rest or experience a uniform motion in a straight line at constant speed provided there's no action of an external force. Thus, unless compelled to change its state by an external force, a body will continue to be at rest or experience a uniform motion in a straight line.
The Newton's first law of motion is also known as the law of inertia; which is the tendency of a body to be at rest unless acted upon by an external force.
In this scenario, you are standing in a subway train and the train suddenly stops but your body continues to move forward. This is in accordance with Newton's first law of motion.
Hence, the sudden stoppage of the train generates a force which acts on the body thereby causing the passenger to tip or move forward.
Why do humans still think there is a god even though science has proven them wrong every time?
Answers
Answer: everyone has a religious belief
Explanation:
You have a belief as well called Scientology
You believe science is more powerful then religion
They also need it as an excuse to think there is somewhere to go when you die so they make the good place heaven and hell
Answer:
people need to believe that there is a higher power guiding them. to explain events that they don't understand. that there is a reason for their existence. people need something to believe in. and you can't say someone's belief is wrong just because you don't agree with it or share that same belief.
Explanation:
True or False: Heavy elements such as Carbon and Nitrogen, that are necessary for life were created in the Big
Bang and have been around in the Universe since that time.
Answers
Answer:
i believe the answer is true
Explanation:
everything was created in the big bang
1. Newton's 1st Law: A skydiver opened their parachute and now experiences a force of gravity of -450 N (down) and a force of air resistance of +450N (up).
a) What is the net force (sum) acting on the skydiver?
Answer:
Answers
Which of the following is NOT an acceleration?
O Riding your bike faster when you head down a hill
Slowing your bike so you can make it up a hill
O Coming to a stop at an intersection
Riding down the street at a constant velocity
Answers
Answer:
coming to stop at intersecton
Explanation do u not know what acceleration is?
what is acceleration
Answers
Answer:
Explanation:
Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.
[tex]{\tt{\red{\underline{\underline{\huge{Answer:}}}}}}[/tex]
[tex]\longrightarrow[/tex] The rate of change of velocity per unit time is called acceleration.
[tex]\longrightarrow[/tex] Its SI unit is m/s².
[tex]\huge\boxed{\fcolorbox{blue}{red}{Thank you}} [/tex]
Spring A has a spring constant of 5 N/m and spring B has a force constant of 9 N/m. A weight of 2 kg is applied to spring A and a weight of 10 kg is applied to spring B. Which of the following is true for the final displacements of springs A and B?
a) Spring B has a larger displacement than spring A. b) Spring A has a larger displacement than spring B. c) Spring A and spring B have the same displacement.
Answers
Answer: Option A.
Spring B has a larger displacement that spring A.
Explanation:
Spring B has a larger displacement that spring A .
By using Hooke's law.
F=-Kx
Where F is force, K is spring constant and x is displacement.
For spring a
Weight / force is 2 kg
Spring constant (K) is 5/nm
Therefore,
F=-Kx
2=-5x
X=2/-5
X= -0.4m
For spring B.
Weight is 10Kg
Spring constant is 9N/m
F=-Kx
10=-9x
X=-10/9
=-1.1m
Therefore Spring B have larger displacement than spring A.
In Hooke's law, negative sign that is present on the spring's force indicate that the force exerted by the spring opposes the spring's displacement.
The support of the State governments in all their rights…I consider one of the essential principles of our Government… How is Jefferson's view reflected in the U.S. Constitution? The U.S. Constitution lists all powers given to the states. The U.S. Constitution gives unlimited power to the states. The U.S. Constitution says powers not given to the federal government belong to the states. The U.S. Constitution gives unlimited power to the federal government and little to the states.
Answers
Answer:
The Correct Answer is
The U.S. Constitution says powers not given to the federal government belong to the states.
Explanation:
In the paragraph, Jefferson states defending the rights of states is one of the fundamental, or most significant, policies of our administration. Did that get you to remember the Tenth Amendment? It restrains the authority of the central government, defending the rights of states. It states that the central government only has the authorities listed in the Constitution. Unlisted authorities belong to the states.
Answer:
D
Explanation:
if 270 watts of power is used in 42 seconds, how much work was done
Answers
Answer: W = 11340J
Explanation:
Hey there! I will give the following steps, if you have any questions feel free to ask me in the comments below.
So this is the Formula: Power = Work / Time.
Step 1: Find the Formula
P = W / T
Step 2: Make W the subject of the equation.
W = PT
Step 3: Given.
P = 270 Watts, T = 42 seconds
Step 4: Substitute these values into equation 2 .
W = 270(42)
Step 5: Simplify.
W = 11340J
The amount of work done was 11340.
~I hope I helped you! :)~
Answer:
W = 11340J
Explanation:
1. Given a list of atomic model descriptions:
A: electron shells outside a central nucleus
B: hard, indivisible sphere
C: mostly empty space
Which list of atomic model descriptions represents
the order of historical development from the earliest
to most recent?
A) A, B, CBA, C, B
CB, C, A D) B, A, C
Answers
Answer: A: electron shells outside a central nucleus
B: hard, indivisible sphere
C: mostly empty space
Which list of atomic model descriptions represents
the order of historical development from the earliest
to most recent?
Explanation:
3
Atomic models have been proposed throughout history describing the possible arrangements of different particles inside the atoms.
The very first model for atom was given by Dalton known as the solid sphere model that was an indivisible hard sphere.The model given by Rutherford that was known as nuclear model mostly included empty space.The model given by Shrodinger showed electron shells as being outside the central nucleus.Thus, the correct order of atom model is B C A. Hence, the correct answer is option C.
https://brainly.com/question/1596638
A cannon is fired horizontally at 243 m/s off of a 62 meter tall, shear vertical cliff. How long will it take the
cannon ball to reach the ground?