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4 years ago

Why does liquid helium form a gas when exposed to room temperature?

Physics

1 answer:

sdas [7]4 years ago

8 0

The liquid helium absorbs energy from the air in the room.

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Because electricity and magnetism are so closely related, factors that affect one often affect the other.

xenn [34]

Answer:

The interactions of electricity and magnetism are difficult to explain in nontechnical terms. This is primarily because one has to describe the interactions in terms of invisible "force fields" which shift, expand, contract, strengthen, weaken, and rotate in space, and these are very difficult to describe adequately in verbal terms. In mathematical terms, coupled sets of three-dimensional vector differential equations are required, and these are also quite difficult to visualize.

Explanation:

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3 years ago

What is compression?

ELEN [110]

Compression is a type of force, like when you crush a soda can, your compressing it.

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3 years ago

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As computer information technology becomes faster, how does the ability of scientists to collect and organize data change?

irina1246 [14]

Because computers and technology develop and become faster things are going to<span> become substantially easier.</span>

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4 years ago

A woman standing on the ground sees a rocket ship move past her at 95% the speed of light. Compared to the rocket at rest, the w

Rufina [12.5K]

As per Einstein's theory of relativity we know that when an object will move with the speed comparable to the speed of light then the length of the object will be different from its length at rest position

This is also known as length contraction theory

As we know here that

$L = L_0\sqrt{1 - \frac{v^2}{c^2}}$

so here we know that

v = 0.95 c

so from above equation we will have

$L = L_0\sqrt{1 - 0.95^2}$

$L = 0.31 L_0$

so here the length will be SHORTER

8 0

3 years ago

A 0.50 kilogram ball is held at a height of 20 meters. What is the kinetic energy of the ball when it reaches halfway after bein

Elis [28]

Answer:

A. 49 joules

Step By Step Solution:

Via kinematic equations we can must first determine the velocity of this object after 10 meters (since halfway of 20 meters is 10).

$v_{final}^2=v_{initial}^2+2gd$

Where the initial velocity is zero since it's held at a height of 20 meters, hence it's not moving initially, g is the average gravity on Earth 9.8 m/s^2 and d is the distance this object will travel so 10 meters. By plugging these values in we obtain:

$v_{final}^2=0+2(9.8)(10)\\\\v_{final}=\sqrt{2(9.8)(10)}=14m/s$

And the equation for kinetic energy is :

$K.E.=\frac{1}{2}mv^2=\frac{1}{2}(0.5kg)(14m/s)^2=49J$

So the kinetic energy halfway after being released is 49 joules.

3 0

3 years ago