D.
The gravitational of a body is possessed by the body due to the virtue of its position.
The formula for gravitational potential energy is,
P.E = mgh joules
Substituting the values
196*9.8*250= 49k
Answer:
40g
Explanation:
20g range > 1.0cm
Therefore,
40g range > 2.0cm
C.
Explanation: Because mirrors are lighter, and they are easier than lenses to make perfectly smooth.
A
