Explain why atoms move at different speeds depending on whether they are in liquid or solids

Answers

Answer 1

Answer: Atoms move a lot faster in liquid because the molecules have more room to move freely. On the other hand, in a solid the molecules are very tight together, giving them little room to wiggle around.

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Two precautions in images of a convex lens

Answers

Answer:

1 . rays should passs through correct center or points(i.e. optic center or focus)

2.your line representing rays should be straight and u should tell the nature of image

Explanation:

Your lines resenting should be straight

How are the frequency and wavelength of electromagnetic waves related?

Answers

The frequency of electromagnetic wave is inversely proportional to the wavelength of the wave.

The speed of a wave is directly proportional to the wavelength of the wave.

v = fλ

where;

v is the speed of the wave
f is the frequency of the wave
λ is the wavelength

The frequency and wavelength of electromagnetic waves is related by the following equation as shown below;

$v = f \lambda \n\nf= (v)/(\lambda)$

Thus, we can conclude that the frequency of electromagnetic wave is inversely proportional to the wavelength of the wave.

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Wavelength is the distance between two peaks of a wave and is usually measured in meters. Frequency refers to the number of cycles a wave must produce to pass a point of origin in a second. Frequency is usually measured in Hertz.

What appears to emit regular bursts of radio waves

Answers

Many things can be made to produce regular bursts of radio waves, however I believe you are referring to pulsars. A pulsar is a rotating star that gives off regular radio frequency bursts.

A mass of gas under constant pressure occupies a volume of 0.5 m3 at a temperature of 20 degree Celsius. Using the formula for cubic expansion, what will be the volume at a temperature of 45 degree Celsius without a change in pressure?A) 0.5228938 m3
B) 0.0228938 m3
C) 0.5457875 m3
D) 0.0457875 m3

Answers

Answer: C) 0.5457875 $m^3$

Explanation: Charles' Law: This law states that volume is directly proportional to the temperature of the gas at constant pressure and number of moles.

$V\propto T$ (At constant pressure and number of moles)

$(V_1)/(T_1)=(V_2)/(T_2)$

where,

$V_1$ = initial volume of gas = $0.5m^3$

$T_1$ = initial temperature of gas = $20^oC=273.15+20=293.15K$

$V_2$ = final volume of gas = 0?

$T_2$ = final temperature of gas = $45^oC=273.15+45=318.15K$

$(0.5)/(293.15)=(V_2)/(318.15)$

$V_2=0.5457875m^3$

Thus the final volume is $0.5457875m^3$

the answer is C 0.5457875

The process in which water ice wind and gravity drop newly formed sedinments is called

Answers

It's called sedimentation. And erosion is when the rock is worn away by the water, and wind and becomes sediment.

The process in which ice, wind and gravity drop newly formed sediments is called sedimentation.

Why is it important to follow all directions in an experiment carefully

Answers

it is important to follow all directions in the experiment for many reasons such as avoid getting hurt, another reason is if you do not follow all the direction you might make a mistake which could ruin the whole experiment.

Final answer:

Following directions in an experiment is crucial for accurately studying the effect of a variable, obtaining valid and repeatable results, and ensuring safety. It is integral to the scientific method, which involves making observations, forming a hypothesis, conducting an experiment, and analyzing results.

Explanation:

It's critical to follow all directions in an experiment correctly for several causes. First, experiments are a part of the scientific method, a process for investigating phenomena and acquiring new knowledge, or correcting and integrating existing knowledge. This method includes making observations, forming a hypothesis, conducting an experiment to test the hypothesis, and analyzing the results to reach a conclusion.

Second, correctly implementing the experimental procedure is necessary to measure the effect accurately and eliminate any lurking variables. It also involves control and experimental groups, which need to be treated differently only in the variable that's being tested. This way, any difference in results is attributed to that variable. Repeating the process under the same conditions confirms that your results were not accidental.

Finally, not following directions can lead to invalid results, incorrect conclusions, and even potential risks and hazards, particularly in certain fields such as chemistry or medicine. Therefore, meticulousness in adhering to instructions is essential for the reliability and safety of the experiment.

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