The acceleration due to gravity on the surface of a planet is five times as large as it is on the surface of earth. the mass density of the planet is known to be four times that of earth. what is the radius of this planet in terms of earth's radius?

1.25 R

Explanation:

Acceleration due to gravity on earth, ge = g

Acceleration due to gravity on planet, gP = 5 times the acceleration due to gravity on earth

gP = 5 g

Density of planet = 5 x density of earth

Let the radius of earth is R

Let the radius of planet is Rp.

Use the for acceleration due to gravity

where, G s the universal gravitational constant and ρ be the density of planet.

For earth

.... (1)

For planet

According to the question

gp = 5 g, ρP = 4 ρ

Substitute the values

  .... (2)

Divide equation (2) by equation (1), we get

Rp = 1.25 R

Thus, the radius of planet 1.25 R.

the gas collects in coils that then becomes a liquid that then flows through the coils inside the refrigerator

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.