_____ developed the universal law of gravitation.

Physics

2 answers:

Sati [7]3 years ago

8 0

Answer: Newton

Explanation:

Anton [14]3 years ago

4 0

Sir Issac Newton developed the Universal law of Gravitation.

<u>Explanation :</u>

With the interesting quest for the answer why does the apply fall from a tree on the Earth, one of the wisest scientists Sir Issac Newton started investigating the action and thus developed the Universal law of Gravitation by estimating what caused the motionless apply to accelerate towards the Earth.

According to his second law of motions, an objects which are at rest (apply attached to the twig of the tree) could get in motion (fall towards the Earth) only through an external force exerted on him by the Earth. He called this force has “Gravity” or the “Gravitational Force”.

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An internal combustion engine uses fuel, of energy content 44.4 MJ/kg, at a rate of 5 kg/h. If the efficiency is 28%, determine

Fudgin [204]

Efficiency = Power Output / Power Input

Power Input = Rate of Energy input = 44.4 MJ/kg * 5 kg/h

= 222 MJ/h

But 1 hour = 3600seconds

222 MJ/h = 222 MJ/3600s = 0.061667 MW J/s = Watts

Power input = 0.061667 MW = 61 667 W

From Efficiency = Power Output / Power Input

   28% = Power Output / 61667

   Power Output = 0.28 * 61667

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Power Output = 17 267 W

Rate of heat Rejection = Power input - Power output

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Rate of heat Rejection = 44 400 W.

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5 0

3 years ago

Outside our solar system the closest star to earth is Proxima century life from the start takes 2200000 minutes to reach earth.

s2008m [1.1K]

Answer:

2200000 = 2.2E6 min for light from Proxima to reach earth

8.3 min from light sun to reach earth

2.2E6/8.3 = 2.56E5 times for light from Proxima

Proxima is about 256,000 times farther away than the sun

Since the sun is about 93,000,000 = 9.3E7 miles from earth

Proxima is then 9.3E7 * 2.56E5 = 2.4E13 miles away

Note - the speed of light is