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4 years ago

The two main states of mechanical energy are ___________ and potential energy.

Physics

2 answers:

shutvik [7]4 years ago

6 0

<span>Potential energy and Kinetic energy</span>

alexgriva [62]4 years ago

4 0

Kinetic.

Potential Energy is the state of energy where something has a high energy that could potentially occur, and kinetic energy is the state of energy where something is occuring.

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At which point is the potential energy the greatest? At which point is kinetic energy the greatest?

notsponge [240]

Answer:

Kinetic energy is greatest at the lowest point of a roller coaster and least at the highest point.

<h2>hope it helps you </h2><h2>make me as brainlylist </h2>

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3 years ago

A long board is free to slide on a sheet of frictionless ice. As shown in the top view in the diagram, a skater skates to the bo

Ede4ka [16]

Answer:

A) rational kinetic energy is conserved

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3 years ago

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4 years ago

A 7.0 mm -diameter copper ball is charged to 40 nC. What fraction of its electrons have been removed? The density of copper is 8

mylen [45]

Answer:

$f = 2.6 \times 10^{-13}$

Explanation:

Let the mass of copper ball is "m" gram

now the total number of copper atom present in the ball is given as

$N = \frac{m}{29} \times 6.02 \times 10^{23}$

now the total number of electrons in one copper atom is 29

so total number of electrons in given sample of copper ball is

$N_e = m(6.02 \times 10^{29})$

now diameter of the ball is 7.0 mm

density of the ball = $8900 kg/m^3$

now we have

$m = (\frac{4}{3}\pi r^3)(8900)$

$m = (\frac{4}{3}\pi(\frac{0.007}{2})^3)(8900)$

$m = 1.6 gram$

now we have

$N_e = 9.63 \times 10^{23}$

now the charge on the copper ball is 40 nC

so the number of electrons removed

$Q = ne$

$40 \times 10^{-9} = n(1.6 \times 10^{-19}$

$n = 2.5 \times 10^{11}$

so the fraction of number of electrons removed is given as

$f = \frac{n}{N_e}$

$f = \frac{2.5 \times 10^{11}}{9.63 \times 10^{23}}$

$f = 2.6 \times 10^{-13}$

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3 years ago

Which statement accurately describes the ultraviolet catastrophe

castortr0y [4]

Answer: A hot lightbulb gave off white visible light instead of ultraviolet light.

Explanation:

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4 years ago