Which is true about surface waves?
a. the disturbance does not have a specific motion.
b. the disturbance is in a circular motion.
c. the disturbance is only parallel to the motion of the wave.
d. the disturbance is only perpedicular to the motion of the wave.

The step-down transformer gives a current of 10a at 24v if the primary voltage is 240v calculate the 1_primary current 2_the power input 3_the power output

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

The speed of light can be used to measure the