A boy standing some distance from the foot of a tall cliff claps
his hands and hears an echo 0.5s
later. If the speed of sound is
340ms-1, how far is he from the
cliff?
O A. 17m
O B. 34m
O C.85m
O D. 170m

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

On a horizontal frictionless surface, a small block with mass 0.200 kg has a collision with a block of mass 0.400 kg. immediately after the collision, the 0.200 kg block is moving at 12.0 m/s in the direction 30° north of east and the 0.400 kg block is moving at 11.2 m/s in the direction 53.1° south of east. use coordinates where the +x-axis is east and the +y-axis is north.(a) what is the total kinetic energy of the two blocks after the collision (in ) what is the x-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your ) what is the y-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your answer.)

What is transferred to an object when work is done