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Ymorist [56]
3 years ago
5

Is it more fun on a swing with low or high amplitude? Explain.

Physics
1 answer:
marusya05 [52]3 years ago
7 0
A pendulum is an object hung from a fixed point that swings back and forth under the action of gravity. In the example of the playground swing, the swing is supported by chains that are attached to fixed points at the top of the swing set. When the swing is raised and released, it will move freely back and forth due to the force of gravity on it. The swing continues moving back and forth without any extra outside help until friction (between the air and the swing and between the chains and the attachment points) slows it down and eventually stops it.
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Solnce55 [7]

Answer:

20 metres per second

Explanation:

60/3

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When have you experienced an increase in kinetic<br> energy within a system?
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Read 2 more answers
A 75-hp (shaft output) motor that has an efficiency of 91% is worn out and is replaced by a high efficiency 75-hp motor that has
ZanzabumX [31]

Answer:

The heat gain of the room due to higher efficiency is 2.84 kW.

Explanation:

Given that,

Output power of shaft = 75 hp

Efficiency = 91%

High efficiency = 95.4%

We need to calculate the electric input given to motor

Using formula of efficiency

\eta=\dfrac{Work\ Output}{Work\ input}

Work\ Input =\dfrac{Work\ output}{\eta}

Work\ Input =\dfrac{75\times746}{0.91}

Work\ Input =61483.51\ W

Work\ Input = 61.48 kW

We need to calculate the electric input

For, heigh efficiency

Work\ Input_{inc} =\dfrac{75\times746}{0.954}

Work\ Input_{int} =58647.7\ W

Work\ Input_{int} = 58.64\ kW

The reduction of the heat gain of the room due to higher efficiency is

Q=Work\ Input-Work\ Input_{int}

Put the value into the formula

Q=61.48 -58.64

Q=2.84\ kW

Hence, The heat gain of the room due to higher efficiency is 2.84 kW.

3 0
3 years ago
In what layer of earth does the temperature rise the fastest <br><br> This is for earth science!!!
CaHeK987 [17]

Answer:

thermosphere

Explanation:

i think

6 0
3 years ago
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