The steel beam is a mass of 330kg iv. With the beam being held still at a height of 40 m, the crane breaks and the
beam falls to the ground. Assuming no air resistance, how much total energy
will the beam have just as it hits the ground?
Pleaseee answer I really need help 40 points

How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.

If a balloon is taken outside on a very cold day, what will occur?

Avolcano erupts next to a grassland area in a valley. a. describe three ways in which material released by the volcano could impact the grassland area. b. describe three ways in which the grassland ecosystem could recover after a volcanic eruption.