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DochEvi [55]
3 years ago
6

How much work are you doing if you push on a 40 N rock that won't move?

Physics
1 answer:
tangare [24]3 years ago
5 0
If the object doesn't move you have done no work.
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A major contribution of Johannes Kepler to the development of modern astronomy was:________.
fgiga [73]

Answer:

<h2>The answer is  planetary motion</h2>

Explanation:

According to Johannes Kepler, the laws governing planetary motion

states that:

1. The orbit of a planet is an ellipse with the Sun at one of the two foci.

2. A line segment joining a planet and the Sun sweeps out equal areas          

   during equal intervals of time.

3. The square of a planet's orbital period is proportional to the cube of the semi-major of its orbit.

Johannes Kepler was a German astronomer, mathematician, and astrologer

Born: 27 December 1571, Weil der Stadt, Germany

Died: 15 November 1630

8 0
3 years ago
It takes you 9.8 min to walk with an average velocity of 1.9 m/s to the north from the bus stop to the museum entrance.
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60 x 9.8 = 588
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3 years ago
If a car is traveling at a velocity of +10m/s suddenly turns around and continues at the same speed, what is its new velocity?
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-10m/s

Explanation:

only the magnitude of the velocity will change due to the change in direction of the car.

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Name some of the mediums that sound can travel through
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gas, liquid, and solid

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Hope this helps, if you need clarification i got you

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