Answer:
True
Explanation:
Acceleration by definition is the change in velocity divided by the change in time. Thus when the velocity changes, there must be an acceleration.
The answer would be...B. DC generators, commutators produce direct current.
I can think of two reasons right away . . .
1). There's no air in space. Nothing to fill your lungs with,
so you can't scream.
2). Even if you had a lung full of air and could scream, sound
needs something like air to travel through. With no air in space,
the sound from you couldn't go anywhere.
Answer:
Since there is no external force, there is no change (movement) in the center of mass. Internally, the center of mass might change position, but the external result is still zero net velocity.
The net recoil velocity must be zero.