A 1000.0 kg car is moving at 15 km/h. If a 2000.0 kg truck has 18 times the kinetic energy of the car, how fast is the truck moving?
A) 45 km/h
B) 63 km/h
C) 54 km/h
D) 36 km/h
Question 2
Which one of the following experiments is the justification for the wave theory of light?
A) Frank-Hertz experiment
B) Newton's rings experiment
C) Huygens' experiment
D) Young's double slit experiment
E) none of the above