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shtirl [24]
3 years ago
13

1) According to the law of conservation of energy, A) an object loses most of its energy as friction. B) the total amount of ene

rgy for a system stays the same. C) the potential energy of an object is always greater than its kinetic energy. D) the kinetic energy of an object is always greater than its potential energy.
Physics
1 answer:
Blababa [14]3 years ago
5 0
Your answer is C) <span> the potential energy of an object is always greater than its kinetic energy </span>
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If a rock has a speed of 12 m/s as it hits the ground, from what height did it
grin007 [14]

Answer:

To find the height the following formula should be used:  

v 2 = u 2 + 2aH

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144

_______ =H

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6 0
3 years ago
How are magnetic poles and electrical charges similar? A. Their same forces repel each other, and their opposite forces attract
melomori [17]

Answer:

A. Their same forces repel each other, and their opposite forces attract each other.

Explanation:

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And also we can see that opposite poles of magnet each other i.e. North pole and south pole always attract each other.

SO here correct answer is

A. Their same forces repel each other, and their opposite forces attract each other.

8 0
3 years ago
a baby carriage is sitting at the top of a hill that is 21m high. The carriage with the baby weighs 12kg. The carriage has _____
Ket [755]
  • Height=h=21m
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\\ \rm\longmapsto P.E=mgh

\\ \rm\longmapsto P.E=12(10)(21)

\\ \rm\longmapsto P.E=120(21)

\\ \rm\longmapsto P.E=2520J

8 0
3 years ago
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