Question 3 A baseball is thrown into a catcher's mitt. Which best describes the transfers of energy when the ball hits the mitt and stops moving
А
The ball loses some of its kinetic energy to the friction from air.
B
When the ball stops moving the energy has been destroyed
С
When the ball hits the mitt, the kinetic enegry is transferred from the ball to the mit as thermal energie
D
No energy transfer occurred. The ball still holds the same amount of kinetic energy
E
When the ball hits the mitt, the kinetic enegry is transferred from the ball to the air as sound energy
F
When the ball hits the mitt, the kinetic enegry is absorbed by the mit
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Follow these directions and answer the questions. 1. set up the ripple tank as in previous investigations. 2. bend the rubber tube to form a "concave mirror" and place in the ripple tank. the water level must be below the top of the hose. 3. generate a few straight pulses with the dowel and observe the reflected waves. do the waves focus (come together) upon reflection? can you locate the place where the waves meet? 4. touch the water surface where the waves converged. what happens to the reflected wave? 5. move your finger twice that distance from the hose (2f = c of c, center of the curvature) and touch the water again. does the image (the reflected wave) appear in the same location (c of c)? you may have to experiment before you find the exact location. sometimes it is hard to visualize with the ripple tank because the waves move so quickly. likewise, it is impossible to "see" light waves because they have such small wavelengths and move at the speed of light. however, both are examples of transverse waves and behave in the same way when a parallel wave fronts hit a curved surface.

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.

It is really hard for me right know