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polet [3.4K]
3 years ago
11

What is the speed of an object that moves 100 km in 45 minutes?

Physics
1 answer:
lana [24]3 years ago
5 0
133 kilometers per hour
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A child wearing socks is trying to see how far he can slide across his kitchen floor. If
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The coefficient of static friction between the ground and the soles of a runner’s shoes is 0.98. What is the maximum speed in which the runner can accelerate without slipping if they have a mass of 73 kg?

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2 years ago
A machine that operates a ride at the fair requires 2500 J to lift a 294 N child 5.0 m. What is the efficiency of this machine?
NeX [460]

Answer:

η = 58.8%

Explanation:

Work is defined as the force applied by the distance traveled by the body.

W =F*d

where:

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d = distance = 5 [m]

W = 294*5\\W = 1470 [J]\\

Efficiency is defined as the energy required to perform an activity in relation to the energy actually added to perform some activity. This can be better understood by means of the following equation.

efficiency = W_{done}/W_{required}\\efficiency = 1470/2500\\efficiency = 0.588 = 58.8%

5 0
3 years ago
Calculate the density of a tin of mass 100g whose dimensions are 2cmx5cmx​
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Light is an electromagnetic wave and travels at the speed of 3.00 x 10^8 m/s
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I think the answer is 2 hope it helps
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