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3 years ago

Can an object have both kinetic energy and gravitational potential energy? Explain.

1 answer:

7 0

Yes, for example a plain is moving so it has kinetic energy, it is also high above the ground so it has gravitational potential energy

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The following images show the four terrestrial planets in our solar system (not to scale). Rank these planets from left to right

Elina [12.6K]

Answer:

Venus, Earth, Mars, Mercury

Explanation:

The atmospheric pressure is determined by the gravitational attraction of the planet over the atmosphere.

Since the gravitational force is defined as:

$F = G\frac{m1m2}{r^{2}}$ (1)

Notice from equation 1, how the gravitational force depends on the masses of the two objects that are interacting and the distance to the square between them.

For this particular case, m1 is the mass of the planet and m2 is the mass of the gasses in the atmosphere. While the r is the distance between those two.

Venus has a more dense atmosphere and than the Earth, so it has a higher atmospheric pressure. The same case can be seen for the Earth and Mars.

Mercury is the one with the lower atmospheric pressure since it has a thin atmosphere as a consequence of his small size.

3 0

3 years ago

What is the angular speed of the tip of the minute hand on a clock

julsineya [31]

Answer:

Its angular speed is 0.105 rad /s. The minute hand of a clock takes 60 minutes = 60 x 60 seconds to complete one rotation.

Hope this Helps!!

Have a nice day :)

Explanation:

4 0

3 years ago

What process produces radiant energy in stars?

noname [10]

"Nuclear Fusion" produces radiant energy in stars

Hope this helps!

7 0

3 years ago

is weigh-in time for the local under-85-kg rugby team. The bathroom scale used to assess eligibility can be described by Hooke’s

yulyashka [42]

Answer:

a) 156960 N/m

b) Yes the player can play on the team.

Explanation:

F = Force

a = Acceleration due to gravity = 9.81 m/s²

m = Mass

k = Spring constant

x = Deformation length of spring

F = ma

From Hooke's law

$F=kx\\\Rightarrow ma=kx\\\Rightarrow k=\frac{ma}{x}\\\Rightarrow k=\frac{120\times 9.81}{0.0075}\\\Rightarrow k=156960\ N/m$

The effective spring constant is 156960 N/m

When x = 0.48 cm = 0.0048 m

$m=\frac{kx}{a}\\\Rightarrow m=\frac{156960\times 0.0048}{9.81}\\\Rightarrow m=76.8\ kg$

The mass of the player is 76.8 kg which is less than the required mass limit of the players' which is 85 kg. So, the player is eligible to play.

5 0

3 years ago

The force of gravity is _m/s2

larisa86 [58]

The force of gravity is positive 9.8m/s^2.

6 0

3 years ago