Answer: 1
Explanation:
Answer:
-0.1
Explanation:
PLES help me for brainless
Answer:
a 1 doesn't belong
Explanation:
Gas has fast moving molecules.
Liquids have slow moving molecules.
Solids have vibrating molecules.
A sound wave has a frequency of 20 Hz and a wavelength of 100 m. What is speed of the wave
The speed of a wave can be calculated using this formula:
v = f x λ
Where:
v is the wave speed in metres per second, m/s
f is the frequency in hertz, Hz
λ (lambda) is the wavelength in metres, m
Calculation:
Given:
f = 20 Hz
λ = 100m
Using the equation:
v = f x λ
v = 20 x 100
v = 2000 m/s
Therfore, the speed of the wave is 2000 m/s
A sound wave has a wavelength of 100 m and a frequency of 20 Hz. The wave's speed is 2× 10^3 m/s.
assuming frequency = 20 Hz and wavelength = 100 m
utilized concept: v= = 20×100 = 2×10³ m/s
Why is frequency important?The frequency in physics is the quantity of waves passing a fixed location in a unit of time. It also indicates how many cycles or vibrations a body in periodic motion experiences in a given unit of time.
How would you define sound?A sort of energy created by vibrations is sound. The molecules of the air surrounding an item vibrate as a result.. These molecules vibrate because they collide with nearby molecules, which also vibrate as a result.
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name the gas evolved when metal carbonates react with acid and state the method
Answer:
the gas evolved is carbon dioxide
Explanation:
for example we can have a look at sodium carbonate reaction with hydrochloric acid
when sodium carbonate reacts with hydrochloric acid, it results in sodium chloride, carbon dioxide and water.
Answer: Carbon dioxide
Is this correct?
If the temperature is below the melting point the substance is a solid
If the temperature is above the boiling point the substance is a gas
If the temperature is in between the boiling and melting points the substances a liquid.
If the normal melting point of a substance is below room temperature, the substance is a liquid at room temperature.
If both the normal melting point and the normal boiling point are above room temperature, the substance is a solid.
Which statement best describes insoluble substances? Insoluble substances remain the same when in water. Insoluble substances become part of the liquid substance. Water does not remain when an insoluble substance is added. Insoluble substances change from solid to liquid states.
Answer:
Insoluble substances remain the same when in water.
Explanation:
When a substance is regarded as insoluble, it means that the substance remains the same in water.
Soluble substances usually form one continuous phase with water when they are added to water (eg when salt is added to water).
However, when camphor is added to water, it does not form a single phase with water. It remains the same in the water and maintains a separate phase from the water. Hence camphor is an insoluble substance.
Choose the coefficient for blank 1 (in front of Rb)
___ Rb + ___ P --> ___ Rb3P
options:
3
1
4
2
Answer:
3
Explanation:
Step 1: RxN
Rb + P → Rb₃P
Step 2: Balance RxN
We will need 3 Rb's on both sides.
3Rb + P → Rb₃P
A metal sample weighs 56.8 grams. How many ounces does this sample
weigh? (1 lb = 16 oz)
Answer:
2 oz. just multiply 56.8 with 0.03527
Explanation:
“Jesus came to serve. How is He calling me to serve?”
Answer:
...
Explanation:
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Q9. NH4OH + HBr H2O + NH4Br
is this combustion, synthesis, single reaction, double reaction, decomposition ?
Answer:
I think its a double reaction
Explanation:
example of physical property
Answer:
Color. I thinkkk.
Phyiscal properties are defined as properties that can be measured or observed without changing the chemical nature of the substance.
Some examples of phsyical properties are:
- Color
- Density
- Volume
- Mass
- Boiling or Melting Points
which of the data sets qualitative data?
Answer:
any data should work as long as you get the question right it should be all fine if you i had this question once and i different sums of data each or each way i did it.
Which is the best way to determine if an object is made of pure silver?
O Determine the solubility of the object.
O Test to see if the object is chemically reactive.
Determine the density of the object and compare the known density of pure silver.
O Compare the mass of the silver object to the mass of a piece of pure silver.
Answer:
The correct option is;
Determine the density of the object and compare the known density of pure Silver
Explanation:
The density of the object is found by finding the weight of the object, and then finding the volume (of water) the object displaces when it is immersed (in water)
The density is then fond by dividing the weighed mass by the volume the object displaces when immersed
Compare the result of the measured density with that of pure silver. If the two have density, as well as other similar physical characteristics, then the object is likely to be pure silver.
the amount of carbWhat is your carbon footprint?
the amount of carbon dioxide you use when recycling
the amount of oxygen put into the atmosphere due to your consumption of fossil fuels
the amount of carbon dioxide and oxygen in the atmosphere at any given time
the amount of carbon dioxide put into the atmosphere due to your consumption of fossil fuelson dioxide put into the atmosphere due to y
Answer:
D
Explanation:
Analyzing a blood sample usually involves which type of separation method?
screening
distillation
centrifugation
filtration
Answer:
the answer is b
Explanation:
i just did quizz
The temperature at which a substance in its solid state melts into the same substance in a liquid is known as
Answer:
0 C
Explanation:
Which of the following properly explains what takes place when light hits polarized film?
A) The intensity of the light is simply dimmed
B)The planes of light become scattered
C)The scattered light has either the horizontal plane or the vertical plane blocked
D)The intensity of the light is brighten
Answer:
C)The scattered light has either the horizontal plane or the vertical plane blocked
Explanation:
When light becomes plane polarized, it means that light is made to vibrate in only one plane.
Light usually vibrate in vertical and horizontal directions but when light becomes polarized, either the vertical or horizontal direction is blocked and it is made to vibrate in only one direction
CAN SOMEONE PLEASE HELP ME ASAP PLEASEE ANYBODY LITERALLY ANYONE OUT THERE PLEASE
Which subatomic particle can be shared between separate atoms?
Answer:
Electrons
Explanation:
Atoms can combine together and share electrons between them. Atoms that share electrons are linked to each other in a form, called a molecule that is in a lower energy state than either of the separate atoms alone.
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What information does not need to be included a chemical waste label? Select one: Relative amounts of chemical compounds in the container. The date the waste container was filled completely. A description of the experiment the chemicals were used for. Names of the chemical compounds present in the container.
Answer:
A description of the experiment the chemicals were used for.
Explanation:
A chemical waste label is required to provide information about any hazardous waste present in the container. Some details are mandatory to mention of the chemical waste label to prevent any accident while doing the experiment, that includes:
Chemical compound's name present in the container.Composition and physical state of the waste.Hazardous properties of the waste.The date of manufacturing.Amount of chemical compounds filled in the container.A chemical waste label does not mention or describe the experiment for which the chemicals were used for, scientists, teacher or students should have knowledge of the chemical composition by reading their names and evaluate themselves on which chemical should be used for which experiment.
Hence, the correct answer is "A description of the experiment the chemicals were used for."
The correct answer is A description of the experiment the chemicals were used for.
A chemical waste label must contain all the information about any hazardous waste present in the container. It should clearly indicate the composition of the waste, the date of manufacturing and the amount of chemical compounds filled in the container. A chemical waste label does not need to mention the experiment for which the chemicals were used.
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what does MA 2 means?
Answer:
Master-at-Arms Petty Officer 2nd Class. MA2. Machine Accountant Second Class (Naval Rating) Copyright 1988-2018 AcronymFinder.com, All rights reserved.
Explanation:
Differences in states of matter are determined by
particle type
particle arrangement
particle color
distance between particles
Answer:
particle distance
solids are tightly packed
liquids are a little farther apart
and gases are very far
Jakasia needed to find the volume of a plastic container in L to see if the 170 L of
solution that she had would fit inside. She knew that one side was 2.5 ft, the
height of the box was 60 cm, and width of the box was 0.8 m. Use dimensional
analysis to determine if Jakasia's solution will fit in the container.
Answer:
The solution will fit into the container.
Explanation:
The following data were obtained from the question'
Volume of solution = 170 L
Length of container (L) = 2.5 ft
Height of container (H) = 60 cm
Width of container (W) = 0.8 m
Volume of container (V) =?
Next, we shall express the length, height and breadth I the same unit of measurement. In this case, we shall all in centimetres (cm).
For the length:
1 ft = 30.48 cm
Therefore,
2.5 ft = 2.5 ft × 30.48 cm / 1 ft
2.5 ft = 76.2 cm
Thus the length is 76.2 cm
For the width:
1 m = 100 cm
Therefore,
0.8 m = 0.8 m × 100 cm / 1 m
0.8 m = 80 cm
Thus, the width of the container is 80 cm.
Next, we shall determine the volume of the container as follow:
ength of container (L) = 76. 2 cm
Height of container (H) = 60 cm
Width of container (W) = 80 cm
Volume of container (V) =?
Volume = length × width × height
Volume = 76.2 × 80 × 60
Volume = 365760 cm³
Finally, we shall convert 365760 cm³ to litre (L). This can be obtained as follow:
1000 cm³ = 1 L
Therefore,
365760 cm³ = 365760 cm³ × 1 L/ 1000 cm³
365760 cm³ = 365.76 L
Therefore, the volume of the container is 365.76 L
Since the volume of the container (i.e 365.76 L) is bigger than the volume of the solution (i.e 170 L), therefore, the solution will fit into the container.
a piece of metal has a mass of 1.3 g/cm and a has a volume of 24.9 cm3 what is its mass
Answer:
34.611g
Explanation:
mass of metal = ?
density of metal = 1.39/cm³
volume = 24.9 cm³
density = mass/volume
mass = density × volume
= 1.39g/cm³ × 24.9 cm³
= 34.611g
What did Edwin Hubble discover about the universe?
O Distant stars are all moving away from us.
O The farthest stars are blueshifted.
O The stars in our galaxy are all moving away from us.
The universe is an unchanging place.
widte speed rom me and distance 502
A yacht sailed at a steady speed for 0.5 hours, passing a cruise ship that was traveling at 25
kilometers per hour. During that time, the yacht traveled 50 kilometers. What was the yacht's
speed?
Write your answer as a whole number.
kilometers per hour
Submit
The speed of the yacht : 100 km/h
Further explanationLinear motion consists of 2: constant velocity motion with constant velocity and uniformly accelerated motion with constant acceleration
At constant velocity motion:the speed of vo = v = constant
acceleration = a = 0
Δx = vt or x = xo + vt
An equation of constant velocity motion
[tex]\large {\boxed {\bold {x = v \times \: t}}}[/tex]
x = distance = m
v = speed = m / s
t = time = seconds
A yacht sailed at a steady speed for 0.5 hours, and traveled 50 kilometers
so the velocity/speed:
[tex]\tt v=\dfrac{x}{t}\\\\v=\dfrac{50~km}{0.5~h}=\boxed{\bold{100~km/h}}[/tex]
When the first periodic table of the elements was published, the elements were arranged by atomic mass. Although
several elements seemed out of order, later discoveries showed the order to be correct.
Which event most likely helped the development of the periodic table?
O Scientists changed the atomic masses to better fit the pattern.
O Scientists refused to consider other ways to organize the elements.
O New technology was developed that modified the masses.
O New information changed the understanding of the atom's structure.
ANSWER ASAP
NEEEDDDD HELP ASAP PLZ PLZ PLZ PLZ PLZ HELP ME
Answer:
[tex]ns^2[/tex]
Explanation:
A trucker is driving from New Jersey to California to make a delivery of couches. He forgets to adjust the pressure of his tires before his trip and end up blowing out two of his tires while driving through Arizona. Whose law does this example depict? What does this law state? Use the law to explain what happened to the tires.
Answer:
Gay-Lussac's law.
Explanation:
According to Gay-Lussac's pressure law, it states that the pressure of a given mass of gas is directly proportional to the absolute temperature of the gas, the assumption that the volume is kept constant.
Hence, the trucker's tires were blown up because they were under high pressure as he drove from New Jersey to California, as a result of this intense pressure the temperature of the air in the tires began to rise and it directly affected the pressure of the gas in the tires' tubes which also increased to a point that they ended up blowing out, obeying Gay-Lussac's law.
Elena held a rock weighing 1 N in her hand. The rock has no velocity.
KE________?
KE = 0
Further explanationEnergy is the ability to do work
Energy because its motion is expressed as Kinetic energy (KE) which can be formulated as:
[tex]\large{\boxed{\bold{KE=\frac{1}{2}mv^2}}}[/tex]
So for two objects that have the same speed, the greater the mass of the object, the greater the kinetic energy
The stone in hand is in a motionless state (at rest) so that its velocity (v) = 0, so it has no kinetic energy
But this stone can have potential energy that is gained due to its height
A liquid has a volume of 225 mL and a mass of 150 g. What is its density? Round your answer to 2 decimal places.
Answer:
The answer is 0.67 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{150}{225} = \frac{2}{3} \\ = 0.66666666...[/tex]
We have the final answer as
0.67 g/mL to two decimal placesHope this helps you
hey guys plz plz plz help me I am struggling I am in middle and struggling to answer this plz help
I have never learned how to calculate the specific heat there is a photo if u know plz answer we have a lot of people trying to figure out how to solve this and know one knows so plz if u know give it your best shot.
thank u I will most definitely appreciate it
and if u answer this correctly I will give 50 point and mark brainliest
of u are just trying to get point u rill be reported
so thanks guys.
Answer:
I've already answered this one for you. Anyway, please let me know if you have any more questions or need help!