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sesenic [268]
3 years ago
14

How much work does a 60kg person do in walking up 5m of stairs

Physics
1 answer:
Nataliya [291]3 years ago
8 0

Answer:

If I’m correct 300 joules

Explanation:

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What is difference between heat engine and carnot engine
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Answer: A heat engine uses temperature differences which cause pressure changes to exert force on a moving part. A Carnot Process is a theoretical explanation of a process involving pressure and temperature changes during ,amongst other things, phase changes.

Explanation:

4 0
2 years ago
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Which two characteristics increase the strength of the gravitational force
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Answer:

The answer is A and C.

Explanation:

Only two factors are relevant when dealing with the gravitational force between two objects - their mass and their distance apart from one another. Gravity's force is proportional to the product of the masses of the two objects and is inversely proportional to the square of the distance between them.

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2 years ago
Why is electrostatic force able to act at a distance ​
mote1985 [20]
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3 years ago
What is the centripetal acceleration of a ball on a string that is whirled horizontally over a boy’s head? The radius of the cir
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4 0
3 years ago
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a radio antenna broadcasts a 1.0 MHz radio wav e with 21 kW of power. Assume that the radiation is emitted uniformly in all dire
My name is Ann [436]

Answer:

I=2.67\times 10^{-6}\ W/m

Explanation:

Given that,

Frequency of a radio antenna is 1 MHz

Power, P = 21 kW

We need to find the the waves intensity 25 km from the antenna . The object emits intenisty evenly in all direction. It can be given by :

I=\dfrac{P}{4\pi r^2}\\\\I=\dfrac{21\times 10^3}{4\pi (25000)^2}\\\\I=2.67\times 10^{-6}\ W/m

So, the wave intensity 25 km from the antenna is 2.67\times 10^{-6}\ W/m.

5 0
3 years ago
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