If William drove the axe into a tree for an effort distance of 5.0 cm and the mechanical advantage of the axe is 0.85, what is the resistance distance of the split tree? A. 5.5 cm

B. 5.9 cm

C. 24 cm

D. 42 cm

A248-g piece of copper is dropped into 390 ml of water at 22.6 °c. the final temperature of the water was measured as 39.9 °c. calculate the initial temperature of the piece of copper. assume that all heat transfer occurs between the copper and the water. remember, the density of water is 1.0 g/m

Why do astronauts in the space shuttle weigh less?

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.