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Rufina [12.5K]
2 years ago
7

A stuntman of mass 55 kg is to be launched horizontally out of a spring-

Physics
1 answer:
zepelin [54]2 years ago
6 0

Answer:20

Explanation: i konw this stuff

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Which would take more force to stop in 10 seconds: an 8.0-kilogram ball rolling in a straight line at a speed of 0.2 m/sec or a
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3 years ago
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What is difference between kilowatt and kilowatt hour?
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Those two units can be compared to a 'mile per hour' and a 'mile per hour - hour'.
One is a rate.  The other is a quantity, after maintaining a rate for some time.

-- 'Joule' is a unit of energy.  It's the amount of work (energy) you do
when you push with a force of 1 newton though a distance of 1 meter.
Lifting 10 pound of beans 3 feet off the floor takes about 40.7 joules of energy.

-- 'Watt' is a <u><em>rate</em></u> of using energy . . . 1 joule per second.
If you lift 10 pounds 3 feet off the floor in 1 second, your <em>power</em> is 40.7 watts.

-- 'Watt-second' is the amount of energy used in one second,
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-- 'Watt-hour' is the amount of energy used in one hour,
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-- 'Kilowatt' is a bigger <em>rate</em> of using energy . . . 1,000 joules per second.

-- 'Kilowatt - second' is the amount of energy used in one second,
at the rate of 1,000 joules per second . . . 1,000 joules .

-- 'Kilowatt - hour' is the amount of energy used in one hour,
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Depending on where you live, 3,600,000 joules of energy bought
from the electric company costs something between 5¢ and 25¢.


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2 years ago
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Answer:

3. Tightly Packed

Explanation:

Hope this helps

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3 years ago
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2 years ago
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