A box is lifted at a constant speed of 7.0 m/s by a machine. If the power of the machine is 21000 W, then the force applied is equal.
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Ответ:
Power=force × speed
21000[W]=F[N]×7[m/s]
F=3000N
Ответ:
harry potter
Explanation:
A lot of damage to the Hogwarts school
The ecosystem stayed they same because the school was excluded
It took a bit of magic to rebuild it
A war is a catastrophic event because a lot of people die and get hurt and more people could be drafted and that would hurt the population