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3 years ago

Explain Kepler's laws

2 answers:

7 0

Kepler's three laws of planetary motion can be stated as follows: (1) All planets move about the Sun in elliptical orbits, having the Sun as one of the foci. (2) A radius vector joining any planet to the Sun sweeps out equal areas in equal lengths of time.

riadik2000 [5.3K]3 years ago

5 0

Kepler's three laws of planetary motion are:

The 1st law is that planets move around the Sun in elliptical orbits. An ellipse is a shape that resembles a flattened circle. The 2nd law is the speed of the planet increases as it nears the sun and decreases as it recedes from the sun. The 3rd law is the square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit.

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An icicle falls off of a skyscraper from rest and falls for 34 seconds. How fast will that icicle be moving after that time? Sho

goblinko [34]

Answer:

<em>The icicle will be moving at 333.54 m/s</em>

Explanation:

<u>Free Fall Motion </u>

A free-falling object falls under the sole influence of gravity. Any object that is being acted upon only by the force of gravity is said to be in a state of free fall. Free-falling objects do not encounter air resistance.

If an object is dropped from rest in a free-falling motion, it falls with a constant acceleration called the acceleration of gravity, which value is $g = 9.81 m/s^2$ .

The final velocity of a free-falling object after a time t is given by:

vf=g.t

The icicle falls from rest for 34 seconds. We need to find the speed after that time:

vf = 9.81*34

vf = 333.54 m/s

The icicle will be moving at 333.54 m/s

7 0

3 years ago

Which is this the correct variable for the equation "____= displacement divided by time"?

zheka24 [161]

The answer is velocity

3 0

3 years ago

How much work is done if you push a box 150 meters with a force of 1.4 N

ss7ja [257]

The work done to push the box is equal to the product between the force and the distance through which the force is applied:
$W=Fd$
In our problem, the force is F=1.4 N and the distance covered is d=150 m, so the work done by pushing the box is
$W=Fd=(1.4 N)(150 m)=210 J$

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Aliun [14]

Answer: C. Magnitude increases by 2

Explanation:

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What is someones target heart rate at 70% at age 17

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Explanation:

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