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3 years ago

When a ball increases in speed by the same amount each second its acceleration?

Physics

1 answer:

MAXImum [283]3 years ago

5 0

Its acceleration is constant.

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What acceleration did you measure from the video? Does this match the acceleration you calculated in the first step?

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Explanation:

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3 years ago

4. List 3 detailed examples of Newton's 3rd Law.

slamgirl [31]

Answer: If one billiard ball hits another, the second will move with the same force as the first.

A child wants to jump to climb a tree (reaction), he must push the ground to propel himself (action).

A man deflates a balloon; the force with which the air comes out causes the balloon to move from one side to the other.

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2 years ago

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The spectrum of a distant star shows that one in 2 e6 of the atoms of a particular element is in its first excited state 7.5 eV

Alchen [17]

Answer:

The temperature of star is 5473.87 K

Explanation:

Given:

Energy difference $\Delta E = 7.5$ eV

The ratio of number of particle $\frac{N_{f} }{N_{i} } = \frac{1}{2 \times 10^{6} }$

Degeneracy ratio $\frac{g_{f} }{g_{i} } = 4$

From the formula of boltzmann distribution for population levels,

$\frac{N_{f} }{N_{i} } =\frac{g_{f} }{g_{i} } e^{-\frac{\Delta E}{kT} }$

Where $k =$ boltzmann constant = $8.62 \times 10^{-5} \frac{eV}{K}$

$\frac{1}{2 \times 10^{6} } =4 e^{-\frac{7.5 eV}{8.62 \times 10^{-5} T} }$

$8 \times 10^{6} } = e^{\frac{7.5 eV}{8.62 \times 10^{-5} T} }$

$\ln(8 \times 10^{6}) = {\frac{7.5 eV}{8.62 \times 10^{-5} T} }$

$T = {\frac{7.5 eV}{8.62 \times 10^{-5} \ln(8 \times 10^{6})} }$

$T = 5473.87$ K

Therefore, the temperature of star is 5473.87 K

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3 years ago

Exam

Sedaia [141]

Out put work
explanation:

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2 years ago

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What is the method of heat transfer sunlight melts a wax crayon left outside.

Mars2501 [29]

Answer:

Hey Friend....

Explanation:

This is ur answer....

<h3><em>Transfer of energy by electromagnetic waves. Radiation doesn't require matter. Sunlight melting a wax crayon left outside is radiation.</em></h3><h3><em /></h3>

Hope it helps!

Brainliest pls!

Follow me! :)

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2 years ago