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Sindrei [870]
3 years ago
7

When an object is heated it contracts. A. True B. False

Physics
1 answer:
Vadim26 [7]3 years ago
4 0

That statement is almost always false.  When anything is heated, it expands ... with one tiny exception.

When water is heated from 0°C to 4°C, it contracts.  I'm pretty sure that this is the only place in nature where this exception to the rule occurs.  If it didn't, then life on Earth wouldn't be possible !

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If the height of the ramp is increased then the marble's speed will be greater because gravity will have less resistance when pu
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If you increase the steepness of the ramp, then you will increase the acceleration of a ball which rolls down the ramp. This can be seen in two different ways: 

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<span>2) Work and energy. The change in potential energy of the ball is its mass times the change in height (only the vertical component counts -- horizontal displacements do not change gravitational potential energy) times the local gravitational acceleration g. This loss of gravitational potential energy shows up as an increase in kinetic energy. If the ball falls a farther distance vertically, it will have a greater kinetic energy and be going faster. Again, the kinetic energy is shared between the motion of the ball going somewhere, and the rotation of the ball, and so the details of the acceleration depend on the ball (is it hollow or solid?), but the dependence on the steepness of the ramp is the same. </span>
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3 years ago
What would a wave with a low amplitude sound like?.
tresset_1 [31]

If you could hear it at all, it would sound very soft.

6 0
3 years ago
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sp2606 [1]

You do it by the pressure difference it causes in the medium. Even in transversal waves, you usually need different units than meters because the wave has electric and magnetic vectors and not really any height to speak of.

you measure the amount of excursion from the equilibrium (no wave) level of whatever parameter is fluctuating.


3 0
4 years ago
A term used to describe the study of motion
aliya0001 [1]

Answer: Kinematics

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3 0
3 years ago
Read 2 more answers
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