4 years ago

A ray diagram is shown.

Physics

2 answers:

Rufina [12.5K]4 years ago

8 0

Answer:

Explanation:

lisov135 [29]4 years ago

6 0

Answer:

Explanation:

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Which was an idea use to distribute the theory of plate tectonics

xxMikexx [17]

Answer:

continental drift

Explanation:

Wegener proposed that the continents plowed through crust of ocean basins, which would explain why the outlines of many coastlines look like they fit together like a puzzle

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4 years ago

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Anton [14]

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3 years ago

You have a source of energy containing 21 gj of energy at 600k how much this energy can be converted to work when rejecting heat

sweet [91]

Answer:

Available energy = 35 x 10⁶ J

Explanation:

Given:

Amount of energy (Q) = 21 gj = 21 x 10⁹ J

Temperature T1 = 600 k

Temperature T0 = 27 + 273 = 300k

Find:

Available energy

Computation:

Available energy = Q[1/T0 - 1/T1]

Available energy = 21 x 10⁹ J[1/300 - 1/600]

Available energy = 35 x 10⁶ J

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3 years ago

Three balls of equal mass are fired simultaneously with equal speeds from the same height h above the ground. Ball 1 is fired st

pantera1 [17]

Answer:

d) v1 = v2 = v3

Explanation:

This can be answered using conservation of energy. We calculate the mechanical energy E=K+U (sum of kinetic and gravitational potential energies) at the original and final points, and impose they are equal.

At the original point we have, for the three balls:

$E_i=K_i+U_i=\frac{mv_i^2}{2}+mgh_i=\frac{mv^2}{2}+mgh$

At the final point we have, for the three balls:

$E_f=K_f+U_f=\frac{mv_f^2}{2}+mgh_f=\frac{mv_f^2}{2}$

Since we have $E_i=E_f$ , and $E_i$ is the same for all balls, then $E_f$ is the same for all balls, which means that $v_f$ , the final velocity, is the same for all balls.

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3 years ago

I need help! Pleeeeeeeeaaaaaaaaaaaaasssssssssssseeeeeeeeeeee?

serious [3.7K]

Answer:

np 500000 eeeeeeeeeeee

Explanation:

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2 years ago