1. D:Asteroids have geological activity
2.A:Short-period comets circle around the sun in 200 years or less and originate in the Kuiper Belt
3.D:All of the above
4.A:It’s gravity is too weak to clear it’s orbit
5.B:Ceres
6.C:Haumea
7.A:Is bigger than Pluto
I hope this helps
Answer:
The answer is "
"
Explanation:
The Formula of acceleration:

Given value:

Calculating the acceleration:


Answer:
option C
Explanation:
the correct answer is option C
When in a confined fluid the pressure is increased in one part than the pressure will equally distribute in the whole system.
According to Pascal's law when pressure is increased in the confined system then the pressure will equally transfer in the whole system.
This law's application is used in machines like hydraulic jacks.
We can solve the problem in two steps:
1) From the weight W=50.0 N of the object, we can find the value of the gravitational acceleration g of the planet. In fact, the weight is equal to

where m=30 kg is the mass of the object. From this, we find g:

2) The gravitational acceleration of a planet with mass M and radius r is given by

where

is the gravitational constant. In our problem, the mass of the planet is

, and we found g in step 1),

, so we have everything to solve and find the value of the radius r: