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GREYUIT [131]
3 years ago
15

Kepler discovered that planets move faster when they are closer to the sun. Which scientist discovered the reason they move fast

er?
a. Brahe
b. Copernicus
c. Newton
d. Ptolemy
Physics
2 answers:
Anna007 [38]3 years ago
8 0
<h3><u>Answer;</u></h3>

C. Newton

<h3><u>Explanation; </u></h3>
  • <em><u>According to Kepler, the orbital speed of a planet varies, depending on its distance from the Sun. The closer a planet is to the Sun, the stronger the Sun’s gravitational pull on it, and the faster the planet moves. The farther it is from the Sun, the weaker the Sun’s gravitational pull, and the slower it moves in its orbit. </u></em>
  • <em><u>While thinking on Kepler's laws, Newton realized that all motion, whether it was the orbit of the Moon around the Earth or an apple falling from a tree, followed the same basic principles.</u></em>
NISA [10]3 years ago
7 0
Pretty sure it was Sir Issac Newton 
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Answer:

-29.2\times 10^{3} N

Explanation:

We are given that

Mass of cars= m=1900 kg

Initial speed of car=u=20 m/s

Final speed of car=v=0

Time=\Delta t=1.3 s

We have to find the average force exerted on the car.

Average force=\frac{change\;in\;momentum}{\Delta t}

F_{avg}=\frac{mv-mu}{1.3}

F_{avg}=\frac{1900(0)-1900(20)}{1.3}

F_{avg}=\frac{-38000}{1.3}=-29.2\times 10^{3} N

Hence, the average force exerted on the car that hits a line of water barrels=-29.2\times 10^{3} N

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After a hold up, Robin Banks flees in his 1575 kg getaway car at 20 m/s. He crashes into a 45 kg highway barrel which is at rest
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Answer:

v = 38.9 m/s

Explanation:

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2 years ago
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7. An object can be accelerating even if its speed is
steposvetlana [31]

Answer:

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Does this look like a good circuit diagram?
AnnyKZ [126]

It's hard to tell what's going on down there in the corner with the resistor and the ammeter. There seems to be as many as 3 or 4 wires in and out of the ammeter, which would be wrong. A real ammeter only has two ... one in and one out. (Same for a resistor.)

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One end of a steel rod of radius R = 10 mm and length L = 80cm is held in a vise. A force of magnitude F = 60kN is then applied
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Answer: 1.91*10^8 N/m²

Explanation:

Given

Radius of the steel, R = 10 mm = 0.01 m

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Area of the rod, A = πr²

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Stress = Force applied on the steel/Area of the steel

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