10. The captain of a spacecraft send a pulse of light towards earth and then exactly 1 minute later (as measured by the
clock on the spacecraft) sends a second pulse. An observer on earth sees the second pulse arrive 4 minutes later after
the first. What is the velocity of the spacecraft relative to the earth?
a. 0.987c
b. 0.968c
c. 0.954c
d. 0.943c
19. A light ray passing through air and strikes a glass surface at an angle of 55° from the normal surface.
What is the angle between the reflected light and the surface?
a. 55°
b. 25°
c. 35°
d. 45°
21. How many lumens pass through the area of 0.5 m^2 on a sphere of radius 5m, if a 700-cd isotropic source is at the
center?
a. 10 lm
b. 14 lm
c. 43 lm
d. 20 lm
26. Two lead balls whose masses are 5kg and 0.50 kg are replaced with their centers 50 cm apart.
With what force do they attract each other?
a. 6.67 x 10^-10 N
b. 6.67 x 10^-11 N
c. 6.67 x 10^-8 N
d. 6.67 x 10^-9 N
30. What is the period of a vibrating object which has an acceleration of 8.02 m/s^2
when its displacement is 1m?
a. 4s
b. 2.22 s
c. 5.33 s
d. 0.25 s
33. A spaceship is 75 m long according to an astronaut on the ship. As it travels away from Earth, scientists on the
ground measure the length of the ship to be 50 m. How fast is the spaceship traveling away from Earth?
a. 0.744 c
b. 0.722 c
c. 0.745 c
d. 0.733 c
36. The tire of a mountain bike has a volume of 0.6 m³ and a pressure of 760 mmHg at 25°C. If the bike is used in the
mountain where the pressure is 720 mmHg and the temperature is 20°C, what will be the volume of the tire?
a. 0.7226 m³
b. 0.2276 m³
c. 0.6227 m³
d. 0.2267 m³
38. A sports car develops 200 hp at 5000 rpm. What is the amount of torque exerted on the crankshaft?
a. 626.2 ft-lb
b. 285.0 N-m
c. 356.2 ft-lb
d. 356.2 N-m
40. A thin converging lens has a focal length of 10 in. If the plate that is located 12.0 behind the lens is used to receive
the image of an object places 40 in from the lens, how large will the image be when compared to the object?
a. 25.00 percent
b. 62.50 percent
c. 31.25 percent
d. 30.00 percent
41. A weight of a mass 10 kg at a location where the acceleration of gravity is 9.77 m/s^2 is _____.
a. 97.7 N
b. 79.7N
c. 98.1N
d. 81.9N
44.What momentum does 50 kg projectile possess if the projectile is moving at 400kph?
a.20000 kg m/s
b. 5555.56 kg m/s
c. 555.565 kg m/s
d. 2000.0 kg m/s