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Serga [27]
3 years ago
7

sunlight, wind, and running water are essentially "free." Yet renewable energy sources are a very small part of our energy consu

mption. Why is this?
Physics
2 answers:
dimulka [17.4K]3 years ago
7 0
The heat and energy of coal burning is more easier and more efficient to turn into electricity than any method using renewable resources. 
lilavasa [31]3 years ago
4 0

Explanation:

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What formula is the correct equation for the law of universal gravitation​
Hitman42 [59]

Answer:

Newton's insight on the inverse-square property of gravitational force was from intuition about the motion of the earth and the moon. The mathematical formula for gravitational force is F=GMmr2 F = G Mm r 2 where G .

Explanation:

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4 0
2 years ago
Calculate the GPE of a rock with a mass of 55kg on a cliff that is 27m high
GaryK [48]

Answer:

<em>P=mgh</em>

<em>P=mghm=55</em>

<em>P=mghm=55g=9.8 or ~10</em>

<em>P=mghm=55g=9.8 or ~10h=27</em>

Explanation:

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4 0
2 years ago
While water skiing behind her father’s boat, Letty is pulled at constant speed by a force of 164 N from the tow rope that makes
kap26 [50]

Answer:

0.265

Explanation:

Draw a free body diagram.  There are four forces:

Normal force Fn pushing up.

Weight force mg pulling down.

Tension force T at an angle θ.

Friction force Fn μ pushing left.

Sum the forces in the y direction:

∑F = ma

Fn + T sin θ − mg = 0

Fn = mg − T sin θ

Sum the forces in the x direction:

∑F = ma

T cos θ − Fn μ = 0

Fn μ = T cos θ

μ = T cos θ / Fn

μ = T cos θ / (mg − T sin θ)

Given T = 164 N, θ = 10.0°, m = 65.0 kg, and g = 9.8 m/s²:

μ = (164 N cos 10.0°) / (65.0 kg × 9.8 m/s² − 164 N sin 10.0°)

μ = 0.265

7 0
3 years ago
Two forces act in opposite directions on a wood block. What will happen if the forces are unbalanced?
worty [1.4K]

Answer:

D

Explanation:

If two unequal forces act in opposite directions, one larger force must cancel out the smaller force,

leaving the net force to be some number in one direction.

Take for example a game of tug-of-war; there are two  OPPOSITE forces (groups of people) acting on the rope, one force is pulling with a force in the negative direction while the other force is pulling in the positive direction.

If the forces on the rope were unequal, then the stronger force (group) will pull everything in their direction.

The same will happen on two unequal forces of opposite directions acting on a wooden block. Therefore, since the resultant force will have a non-zero magnitude and direction, there will be a change in the block's motion and position.

7 0
3 years ago
A man has a mass of 85kg, what is his weight
Ostrovityanka [42]
The answer is he weighs 187.39 LBS/Pounds
5 0
3 years ago
Read 2 more answers
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