3 years ago

List the three ways in which water reaches the atmosphere

Physics

1 answer:

frozen [14]3 years ago

7 0

Water cycle, evaporation, condensation, and freezing

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Which of the following describe a neutron?

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4 years ago

If an element has a charge of 2+, how many more protons does it have than electrons?

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Explanation:

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2 years ago

A kangaroo has a maximum gravitational potential energy during one jump of 770 J

KengaRu [80]

Answer:

k = 44000 N/m

Explanation:

Given the following data;

Maximum gravitational potential energy = 770 J

Elastic potential energy = 14% of 770 J = 14/100 * 770 = 107.8 J

Extension, x = 42 - 35 = 7cm to meters = 7/100 = 0.07 m

To find the spring constant, k;

The elastic potential energy of an object is given by the formula;

$E.P.E = \frac {1}{2}kx^{2}$

Substituting into the equation, we have;

$107.8 = \frac {1}{2}*k*0.07^{2}$

$107.8 = \frac {1}{2}*k*0.0049$

Cross-multiplying, we have;

$215.6 = k*0.0049$

$k = \frac {215.6}{0.0049}$

k = 44000 N/m

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3 years ago