Which statement must be true in order for a rocket to travel from Earth to another planet?
A. It must carry a lot of extra fuel.
B. It must have very large engines.
C. It must attain escape velocity from Earth.
D. It must be launched from space, rather than from the ground.
Answer:C
Which statement must be true in order for a rocket to travel from Earth to another planet?
A. It must carry a lot of extra fuel. B. It must have very large engines. C. It must attain escape velocity from Earth. D. It must be launched from space, rather than from the ground.