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dangina [55]
3 years ago
6

A 2-kg book falls off a shelf. It hits a student traveling 2 m/s. How much kinetic energy does the book have?

Physics
1 answer:
Gekata [30.6K]3 years ago
3 0

4 J

1/2 mv^2 is ke formula

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Light with energy equal to three times the work function of a given metal causes the metal to eject photoelectrons. What is the
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The ratio of the maximum photoelectron kinetic energy to the work function will be 3:1.

<h3 /><h3>What is the photoelectric effect?</h3>

When a medium receives electromagnetic radiation, electrostatically charged particles are emitted from or inside it.

The emission of ions from a steel plate when light falls on it is a common definition of the effect. The substance could be a solid, liquid, or gas; and the released particles could be protons or electrons.

A particular metal emits photoelectrons when exposed to light with energy three times its work function:

\rm KE=3 \phi

The ratio of the maximum photoelectron kinetic energy to the work function will be;

R=\frac{E}{\phi} \\\\ R=\frac{3 \phi}{\phi} \\\\ R= 3

Hence, the ratio of the maximum photoelectron kinetic energy to the work function will be 3:1.

To learn more about the photoelectric effect refer to the link;

brainly.com/question/9260704

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Gas liquids will both expand to fll their containers true or false
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What is the rising of rock layers called
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The answer of this question is called uplift i.e the rising of rock layers in geology is called uplift.

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Answer:

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