Two spaceships approaching each other move at very close to the speed of light, each sending a beam of light to the other. Each measures the speed of light from the other spaceship as
A) slightly less than c.
B) c.
C) slightly greater than c.
D) much greater than c.
Answer: B
You might also like to view...
The fast rotation of neutron stars is a consequence of ________.
A. Wien's law B. their high temperature C. the doppler effect D. the law of conservation of angular momentum
Two balls, one of radius R and mass M, the other of radius 2R and mass 8M, roll down an incline. They start together from rest at the top of the incline. Which one will reach the bottom of the incline first?
A) The small sphere B) Both reach the bottom together. C) The large sphere D) It depends on the height of the incline. E) It depends on the length of the inclined surface.
A 10-pound sack of potatoes falls from an airplane. As the velocity of the falling sack increases, so does the air resistance on it. When the air resistance equals 10 pounds, the acceleration of the sack will be
A. zero. B. 9.8 m/s. C. 9.8 m/s2. D. 100 ft/s2.
Which of the following is NOT a type of plate boundary?
What will be an ideal response?