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VARVARA [1.3K]
3 years ago
11

What is one of Kepler's laws of planetary motion?

Physics
1 answer:
VikaD [51]3 years ago
4 0

The Kepler laws of planetary motion are:

1) The planets revolve around the Sun following elliptical orbits, in which the Sun occupies one of the two focii

2) A line segment connecting the Sun with the center of each planet sweeps out equal areas in equal intervals of time --> this means that the speed of the planet changes according to its distance from the Sun: the closer to the Sun, the faster the planet

3) The square of the orbital period of the planets is proportional to the cube of the semi-major axis of the orbit. In formula

\frac{T^2}{r^3} = const.

and the constant in the equation has the same value for every planet orbiting around the Sun.

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Friction is defined as *
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Answer:

O a force that opposes motion

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What are noble gases?
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Answer:

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6 0
3 years ago
An automatic clothing drier spins at 51.6 rev/min. If the radius of the drier drum is 30.5cm, how fast (in m/s) is the drier dru
Jlenok [28]

Answer:

1.648 m/s

Explanation:

1 revolution equals 2pi radians.

Calculate the angular velocity by taking 2pi x v, then divide by 60 seconds.

To convert this to m/s, simply take this answer and multiply it by 0.305m (a.k.a. the radius of the circle).

3 0
3 years ago
A train traveled 100 kilometers north in 2 hours. After exchanging some railroad cars, it traveled 100 kilometers south in 2 hou
hodyreva [135]

Answer:Due to change in direction

Explanation:

Given

Initially train has traveled a 100 km in North and after exchanging some railroad cars, it traveled 100 in south.

The velocity of the train changes as it direction of motion changes. Velocity is the vector quantity which require direction and magnitude for its reperesentation.

7 0
2 years ago
How fast is a 90kg man running if his kinetic energy is 720 J?
zheka24 [161]
Answer:
4 m/s
Explanation:
KE=1/2mv^2
720=1/2(90)
720=45v^2
divide by 45
16= v^2
over the square root
4=v
v= 4m/s
6 0
3 years ago
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