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Vladimir79 [104]
3 years ago
14

PLEASE HELP ME?!?! PLEASE PLEASE

Physics
1 answer:
Dmitry [639]3 years ago
8 0
(1) <span>Electric current is defined as the rate of </span>charge<span> flow past a given point in an electric circuit. It is measured in Coulombs/second, also called Amperes. In </span>DC electric circuits<span>, it can be assumed that the </span>resistance<span> to current flow is a constant so that the current in the circuit is related to </span>voltage<span> and resistance by </span>Ohm's law, which is:
<span>
V = I*R
Where V = Voltage
I = Current
R = Resistance

(2) The answer is attached in image form down below(please find attachment)
(3) </span>The answer is attached in image form down below(please find attachment)

(4) <span>Renewable energy is the energy which is generated from the natural sources i.e. sun, tides, wind etc. Examples are: Solar Energy, Wind energy( windmill) etc. for electricity generation.
Advantages of Renewable Energy:
1) It is available in abundant quantity.
2) It is free to use.
3) It has </span><span>low carbon emissions, therefore it is considered as green and environment friendly.
Disadvantages of Renewable Energy:
1) It is not easy to setup plants and machinery for renewable energy.
2) Initial costs for setting up those plants and machinery is quite high.
3) The energy from the natural sources is not available 24/7. In Solar energy case, energy </span><span>can be used during the day time and not during night or rainy season etc.
</span>
Non-Renewable energy is energy which is taken from the sources that are available on the earth in limited quantity. Sources may be <span>fossil fuels, natural gas, oil and coal etc.
</span><span>Advantages of Non-Renewable Energy Sources:
1) They are easy to use.
2) They are cheap.

Disadvantages:
</span>1) They will expire some day (as they are limited).
2) The speed at which such resources are being used can have serious environmental changes.
3) They release toxic gases in the air when burnt which are the major cause for global warming.
<span>4) Since these sources are going to expire soon, prices of these sources are proliferating day by day.
</span><span>
Now you should judge all by yourself which is the better energy source.
-i

</span>

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I need help on this question!!
mr_godi [17]

Answer:

\boxed {\boxed {\sf 6000 \ Joules}}

Explanation:

Work is the product of force and distance.

W=F*d

The force is 500 Newtons and the couch is raised 12 meters above the ground.

Substitute these values into the formula.

W=500 \ N * 12 \ m

Multiply.

W=6000 \ N*m

  • 1 Newton meter is equal to 1 Joule.
  • So, our answer of 6000 N*m equals 6000 J

W= 6000 \ J

The work done to move a 500 Newton couch 12 meters is <u>6000 Joules</u>. Therefore, choice D is correct.

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A 1000 kg car collides with a 1 mg mosquito. By what factor will the acceleration of the mosquito be greater than the accelerati
rodikova [14]

Answer:

The acceleration of the mosquito is 1 million (10⁶) times that of the car

Explanation:

From Newton’s Third Law, every action has an equal and opposite reaction. Therefore, when the car and the mosquito collide, the force the car exerts on the mosquito equals the force the mosquito exerts on the car.

F₁ = F₂

Also, from Newton’s Second Law, F₁ = ma₁

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And force exerted by the mosquito, F₂ = 0.001 * a₂

Equating both sides

1000a₁ = 0.001a₂

Taking the ratio of the acceleration of the mosquito and that of the car, a₂/a₁:

a₂/a₁ = 1000/0.001

a₂/a₁ = 1000000

Therefore, the acceleration of the mosquito is 1000000 (10⁶) times that of the car

3 0
3 years ago
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