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Alina [70]
4 years ago
11

Give an example of how the environment can affect energy transfer.

Physics
1 answer:
KiRa [710]4 years ago
7 0

The electric current running through power lines is one of the examples where the environment affects the energy transfer.

<u>Explanation: </u>

Whenever there is an energy transfer between two systems, some factors existing in the environment hinder the law of conservation of energy. Let’s take an example of power lines.

When current flows through the power lines, the electrons move inside the wires. The surface of the wires exert an equal and opposite friction to the nearest electrons.

This results in the loss of some electrical energy which converted into heat and exerted out through the wires in the environment. Thus, we don’t have the exact amount of electrical energy which was transferred to our homes. The loss of energy can be calculated in terms of efficiency, formulated as,

\text {Efficiency}=\left(\frac{\text {Total energy applied}}{\text {energy gained}}\right) \times 100

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An elevator whose mass is m = 400 kilograms is supported by a cable. A frictional force of f = 80 newtons is applied to the elev
Dmitry_Shevchenko [17]

Answer:

3924 N

5124 N

4004 N

2884 N

4004 N

Explanation:

m = Mass of elevator = 400 kg

g = Acceleration due to gravity = 9.81 m/s²

a = Acceleration

f = Friction force = 80 N

When the elevator is stationary only the acceleration due to gravity will be acting on it

Tension

T=mg\\\Rightarrow T=400\times 9.81\\\Rightarrow T=3924\ N

The tension is 3924 N

The balanced force equation would be

T-mg-f=ma\\\Rightarrow T=ma+mg+f\\\Rightarrow T=400\times 2.8+400\times 9.81+80\\\Rightarrow T=5124\ N

The tension is 5124 N

When velocity is constant acceleration is zero

T-mg-f=0\\\Rightarrow T=mg+f\\\Rightarrow T=400\times 9.81+80\\\Rightarrow T=4004\ N

The tension is 4004 N

T-mg-f=-ma\\\Rightarrow T=-ma+mg+f\\\Rightarrow T=-400\times 2.8+400\times 9.81+80\\\Rightarrow T=2884\ N

The tension would be 2884 N

When velocity is constant acceleration is zero

T-mg-f=0\\\Rightarrow T=mg+f\\\Rightarrow T=400\times 9.81+80\\\Rightarrow T=4004\ N

The tension is 4004 N

4 0
4 years ago
If the earth’s tilt on it axis were to increase by 20 degrees, what would happen to earth?
Triss [41]

Each pole would become tropical during summer, but be horribly cold during winter, far colder than they are now. But the equator would be in perpetual twilight during two seasons—and summer the opposing two.

4 0
3 years ago
How are reflecting telescopes similar to devices that produce laser light?
Novosadov [1.4K]

Answer:a

Explanation:

Because its light

7 0
3 years ago
Angel hits a ball with a ball. The action is the ball . What what is reaction force?
Mumz [18]

When Angel hits a ball with the ball. As the action is a ball as it is hitted. The reaction force is the force exerted on another ball.

Newton’s third law of motion describes the two forces, action and reaction forces. This states that for every action force, there is an equal and opposite reaction force.

As Angel hits a ball with another ball, the action is the ball as it is hit. The ball exerts a force on the ball. This is the action force. The ball exerts an equal and opposite force on the bat, which is known as the reaction force.

Learn more about Newton's Law of motion:

brainly.com/question/10454047

#SPJ10

5 0
2 years ago
How are land-use laws in the United States different from the land-use laws inherited from England?
7nadin3 [17]
Private property owners must allow for public access and use.
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3 years ago
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