What information does a ship's sonar device use to determine the distance to the ocean floor? A. The speed of sound in water and the time it takes for a signal to return.

B. The temperature of the water and the temperature of the air above it.
C. The composition of the ocean floor and the water temperature near the ocean floor.
D. The mass of the ship and the volume of water displaced by the ship.

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.)