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devlian [24]
3 years ago
8

While standing in a low tunnel, you raise your arms and push against the ceiling with a force of 100 n. your mass is 70 kg. what

force does the ceiling exert on you?
Physics
1 answer:
alekssr [168]3 years ago
3 0
This is a manifestation of Newton's third law of motion called the Law of Action-Interaction. It states that when a body is at rest or not moving, for every force exerted on the object, an equal,opposite force is exerted also towards you. Thus, the ceiling also exerts an equal force of 100 Newtons.
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A light has wavelength of is used in the double slits experiment . Which of the following values represent the phase difference
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Answer:

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Explanation:

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Why does the mass spectrum of Br2 contain three signals whose heights are almost in the ratio of 1:2:1? What are the origins of
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You push a box with a force of 80 n. if the net force on the box is 50 n, what is the force on the box due to sliding friction?
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A substance freezes at -58c therefore substance melts at ?
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3 0
2 years ago
Which of the following involve an increase in the entropy of the system under consideration? a. melting of a solid b. evaporatio
Mama L [17]

Explanation:

Since, entropy is the measure of degree of randomness. So, more randomly the molecules of a substance are moving more will be its entropy.

  • For example, when a solid melts then it means heat is absorbed by it due to which its molecules have gained energy. As a result, they collide with each other and hence, entropy will increase.
  • Evaporation of a liquid will also cause the liquid to change its state from liquid to gas. This means molecules will go far away from each other leading to an increase in the entropy.
  • Sublimation is a process of conversion of a solid into gaseous phase without going through liquid phase. So, in this case also entropy will increase due to gain in energy by the molecules of a solid.
  • In freezing, molecules of a substance come closer to each other and acquire less energy. Hence, entropy decreases.
  • Mixing is a process of combining two or more substances physically with each other. This leads to increase in entropy of a substance.
  • In separation molecules are separated from each other leading to a decrease in energy. Hence, entropy will also decrease.
  • Diffusion is a process in which molecules are able to rapidly move from one place to another. Hence, entropy increases when diffusion takes place.

Thus, we can conclude that melting of a solid, evaporation of a liquid, sublimation, mixing and diffusion involve an increase in the entropy of the system under consideration.

8 0
3 years ago
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