C.) Work done = Force x displacement = 1200 x 2.5 = 3000 J. Hope this helps!
Gravitational force pushes down on us to keep us on the ground. So it pushes in a downward direction.
The focal length would likely decrease as the refractive index and the increase when the curvature radius of the lens increases. The decrease in focal length happens since a higher index of refraction would signify that the rays of the sun striking to an object would tend to bend more.
The answer is Conduction: the process of heat is directly transmitted through a substance when there is a difference in temperature.
