Coal, petroleum, and natural gas are considered nonrenewable because they can not be replenished in a short period of time
4 is the difference sorry if i got it wrong :( :(
The position of the centre of gravity of an object affects its stability. The lower the centre of gravity (G) is, the more stable the object. The higher it is the more likely the object is to topple over if it is pushed. Racing cars have really low centres of gravity so that they can corner rapidly without turning over.
Increasing the area of the base will also increase the stability of an object, the bigger the area the more stable the object. Rugby players will stand with their feet well apart if they are standing and expect to be tackled.
In the 4.10 seconds that elapsed, Ben reaches a velocity of


In this time, his displacement
satisfies


The density is about 3.88. You just have to divide the mass and the volume. You can check this on a calculator, too. Hope this helped