3 years ago

Nothing is exempt from ________, which states the total energy remains constant during a physical change.

1 answer:

8 0

Energy remains constant, so it doesn't change, which means it is conserved. The answer is a, the law of energy conservation.

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Sometimes in the winter, ice crystals grow directly from the moisture in the air. As the water changes from a gas to a solid, th

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Answer: B. slow down as they lose energy

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3 years ago

Which type of wave has a longer wavelength: AM radio waves (with frequencies in the kilohertz range) or FM radio waves (with fre

faltersainse [42]

Answer:

AM has longer wavelength

Explanation:

The relation between the wavelength and teh frequency is given by

v = f x λ

Where, f is the frequency and λ be the wavelength.

It shows that the wavelength is inversely proportional to the frequency.

So, higher the frequency, smaller be the wavelength.

So, FM has high frequency than AM, thus, FM has lower wavelength as compared to AM.

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3 years ago

A ball is dropped from rest from a height h above the ground. another ball is thrown vertically upwards from the ground at the i

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The position of the first ball is

$y_1=h-\dfrac g2t^2$

while the position of the second ball, thrown with initial velocity $v$ , is

$y_2=vt-\dfrac g2t^2$

The time it takes for the first ball to reach the halfway point satisfies

$\dfrac h2=h-\dfrac g2t^2$

$\implies\dfrac h2=\dfrac g2t^2$

$\implies t=\sqrt{\dfrac hg}$

We want the second ball to reach the same height at the same time, so that

$\dfrac h2=v\sqrt{\dfrac hg}-\dfrac g2\left(\sqrt{\dfrac hg}\right)^2$

$\implies h=2v\sqrt{\dfrac hg}-g\left(\dfrac hg\right)$

$\implies h=v\sqrt{\dfrac hg}$

$\implies v=\sqrt{hg}$

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4 years ago

How does resistant affect the current in a cirtuit

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Resistance reduces the current. If there is more resistance, there is less current.

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3 years ago

Which statement about protons is true?

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GIVE vo0Mac0ov Brainliest ... He's smart

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3 years ago

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