Answer = A) fossil fuels
B and C are renewable types of energy
D is a type of fossil fuel, just like oil
Answer:
Height will be 5.127 m
Explanation:
We have given mass m = 49 kg
Speed over the bar v = 10 m /sec
Acceleration due to gravity 
Kinetic energy on the ground 
Potential energy on the ground 
(as height will be zero )
Speed above the bar = 0.7 m /sec
So kinetic energy above the bar 
Potential energy above the bar = mgh
From energy conservation
Total kinetic energy = total potential energy
So 
The air and balloon themselves contract (shrink) because of contact with the very cold liquid N
The far side of the Moon is the hemisphere of the Moon that always faces away from Earth. The far side's terrain is rugged with a multitude of impact craters and relatively few flat lunar maria compared to the near side. It has one of the largest craters in the Solar System, the South Pole–Aitken basin.
Answer:
The answer to your question is: C. -9.81 m/s²
Explanation:
A. 9.81 m/s² acceleration is considered positive when it goes to the center of the earth, so this option is incorrect.
B. 0 m/s² This option is incorrect because acceleration is 0 for a linear motion without acceleration.
C. -9.81 m/s² If a projectile goes to the sky, then the acceleration will be negative.
D. It is not constant. Acceleration is constant.
