A rocket develops 10,000 N of thrust at liftoff. If the speed of the ejected fuel is 2000 m/s, at what rate (in kg/s) must the fuel be ejected?
What will be an ideal response?
5 kg/s
Physics & Space Science
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A child on a skateboard is moving at a speed of 2 m/s. After a force acts on the child, her speed is 3 m/s. What can you say about the work done by the external force on the child?
a) positive work was done b) negative work was done c) zero work was done
Physics & Space Science
Certain types of sunglasses are very effective at diminishing light reflected from surfaces because of __________
Fill in the blank(s) with correct word
Physics & Space Science
When electric current is flowing in a metal, the electrons are moving
A) at nearly the speed of light. B) at the speed of light. C) at the speed of sound in the metal. D) at the speed of sound in air. E) at none of the above speeds.
Physics & Space Science
The Meissner effect in a superconductor
Physics & Space Science