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4 years ago

Why does metal feel colder than cardboard? Enter in complete sentences

1 answer:

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<span>For any object to feel cold, it must be colder than your hand. Cardboard is made of materials that do not hold in coldness that we feel. However, metal absorbs the cold, and thus we feel the temperature because of the contrast of our body temperature.</span>

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If lightning is caused by electricity in the air during a thunderstorm, what causes thunder?

NikAS [45]

Answer:

Since light travels faster than sound, the lightning arrives before the thunder. But thunder is the sound of lightning shooting through the sky in a thunderstorm.

Explanation:

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3 years ago

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Which describes a sound wave?

cluponka [151]

Answer:

a sound wave is an electromagnetic wave

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4 years ago

You have been abducted by aliens and find yourself on a strange planet. Fortunately, you have a meter stick with you. You observ

defon

Answer:

$36.4276\ m/s^2$

Explanation:

m = Mass of stick

L = Length of stick = 1 m

h = Center of mass of stick = $\dfrac{1}{2}=0.5\ m$

g = Acceleration due to gravity

T = Time period = 0.85 s

Time period is given by

$T=2\pi\sqrt{\dfrac{I}{mgh}}$

Moment of inertia is given by

$I=m\dfrac{L^2}{3}$

$T=2\pi\sqrt{\dfrac{m\dfrac{L^2}{3}}{mgh}}\\\Rightarrow T=2\pi\sqrt{\dfrac{L^2}{3gh}}\\\Rightarrow g=\dfrac{4\pi^2L^2}{3hT^2}\\\Rightarrow g=\dfrac{4\pi^2\times 1^2}{3\times 0.5\times 0.85^2}\\\Rightarrow g=36.4276\ m/s^2$

The acceleration of gravity on this planet is $36.4276\ m/s^2$

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3 years ago

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A physical property that describes Mayte a solos líquidos or gas?

Margaret [11]

Answer: matter

Explanation: matter

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3 years ago

In an industrial process, nitrogen is heated to 500 k at a constant volume of 1 m3 . the gas enters the container at 300 k and 1

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A boiling pot of water (the water travels in a current throughout the pot), a hot air balloon (hot air rises, making the balloon rise) , and cup of a steaming, hot liquid (hot air rises, creating steam) are all situations where convection occurs.
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