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Citrus2011 [14]
3 years ago
13

Joe balances a stationary coin on the the tip of his finger 20 cm from the top of the table. How much work is Joe doing?

Physics
1 answer:
adell [148]3 years ago
7 0

The work done by Joe is 0 J.

<u>Explanation</u>:

When a force is applied to an object, there will be a movement because of the applied force to a certain distance. This transfer of energy when a force is applied to an object that tends to move the object is known as work done.

The energy is transferred from one state to another and the stored energy is equal to the work done.

                                 W = F . D

where F represents the force in newton,  

          D represents the distance or displacement of an object.

Force = 0 N,   D = 20 cm = 0.20 m

                                 W = 0 \times 0.20 = 0 J.

Hence the work done by Joe is 0 J.

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lora16 [44]

Answer:

Explanation:

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The convection area is just above the radiation zone. As materials from the suns core are heated, they rise above the radiation zone towards the EDGE of the convection area then sinks back again into the radiative zone for more heat.

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5 0
3 years ago
Car accelerates 86km/hr in 4.6s . What is the average acceleration in m/s^2
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4 0
3 years ago
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sergey [27]

Answer:

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Refracted rays change direction and go back to the original medium is false for refraction however, it is true for reflection.

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