Velocity Addition: Two spaceships, each 100 m long in its own rest frame, approach Earth from opposite directions, with equal speeds relative to Earth. As measured by a passenger in one of the spaceships, the other spaceship is 96 m long. What is the speed of the spaceships relative to Earth?
A. c/7
B. c/6
C. c/5
D. c/4
E. c/3
Answer: A
You might also like to view...
Under what circumstances can differentiation occur in a planet?
A) The planet must have a rocky surface. B) The planet must be made of both metal and rock. C) The planet must have an atmosphere. D) The planet must be geologically active, that is, have volcanoes, planetquakes, and erosion from weather. E) The planet must have a molten interior.
A huge explosion is heard 20 miles away. How long does it take the sound to travel that far? (20 miles = 32,000 meters)
Which of the following were marine invertebrates that looked like plants and left fossil segments sometimes called "Indian money"?
a. Trilobites b. Gastropods c. Crinoids d. Brachiopods
Uniform motion is any motion at constant speed
Indicate whether the statement is true or false