Answer:
the greater the height of an object the *greater* its gravitational potential energy
greater
<span>they are: *the rise of Christianity in Europe *the fall of the roman empire</span>
<span>So we want to know which statement is true for the body of mass m=2000kg that is lifted to a height of h=15m in t=15 s. Lets calculate each of the following: Gravity force on the body is F=m*g=2000*9.81=19620 N so a is FALSE. Potential energy of the body when it is lifted to the height of 15 m is Ep=m*g*h=2000*9.81*15=294300 J so b is FALSE. Work to lift the body is: W=Fg*h=2000*9.81*15= Ep=294300 J so c is FALSE. Power P=W/t=294300/15=19620 W So d is TRUE. </span>
Answer:
3 x 10^18 kg
Explanation:
Time period, T = 3 days = 86400 x 3 = 259200 seconds
r = 7 x 10^5 m
Let M be the mass of planet
Use the formula of time period of satellite
Where, G be the universal gravitational constant.
By substituting the values
M = 3 x 10^18 kg
Thus , the mass of planet is 3 x 10^18 kg.
Answer:
I am kind of confused-
Explanation:
Do you mind re-writing and explaining the question more?