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3 years ago

What happens to the energy put into a machine that does not get used to do useful work?

2 answers:

3 0

"Most gets converted to heat energy" is the one among the following choices given in the question that describes what <span>happens to the energy put into a machine that does not get used to do useful work. The correct option among all the options that are given in the question is the second option or option "B". I hope it helps you.</span>

iris [78.8K]3 years ago

3 0

Answer:

B. most gets converted to heat energy

Explanation:

Let us take the example of a car. Though some formula one cars have 50% efficiency, the efficiency of an internal combustion car varies between 18–20%. Though some formula one cars have 50% efficiency This means that more than 80% of energy is not utilized hence it is wasted. Little energy does get converted to sound. But almost no energy changes to light.

So, most gets converted to heat energy.

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Suppose a 4.0 kg mass of water gained heat and increased in temperature from 10°C to 15°C. The specific heat capacity of water i

Alex73 [517]

It will be <span>Your answer </span>84 ok

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3 years ago

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Pretend a person can walk only at a certain pace – no faster, no slower. If you time her uninterrupted walk across a room of kno

Free_Kalibri [48]

Explanation:

If a person is set to walk on a constant speed regardless of the situations then if the person walks a certain distance with no interruptions in an observed time then her speed can be calculated.

When the same person walking through the room momentarily stops to introduce herself then the average speed of the of the person slows down as it happens with the light wave when passes through glass which is an optically denser medium than the air, but the light wave does not stop anywhere in the medium.

It can be more relevant to the person's speed when she walks wading through the water or the person walks through the sand then the person feels resistance in the sand or in water which reduces her overall speed.

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3 years ago

If the core of jupiter is 30,000 celcius and it is five times hotter than the sun, what's the temperature of the surface of the

VMariaS [17]

Let, the temperature of Sun's surface = c

So, 5c = 30, 000
c = 30,000 / 5
c = 6,000

In short, Your Answer would be 6000

Hope this helps!

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4 years ago

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What are some 2 safety Equipment

damaskus [11]

Answer:

What are the different personal protective equipment?

Personal protective equipment, commonly referred to as “PPE”, is equipment worn to minimize exposure to a variety of hazards. Examples of PPE include such items as gloves, foot and eye protection, protective hearing devices (earplugs, muffs) hard hats, respirators and full body suits. Understand the types of PPE.

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3 years ago

9. Carlos jumps out of a hovering helicopter. After he opens his parachute, his acceleration due to gravity decreases

nata0808 [166]

Answer:

A The force of air resistance becomes equal in magnitude to his weight.

Explanation:

When Carlos jumped out of the helicopter, he fell with a downward force which is proportional to his weight.

His weight is the product of his mass and acceleration due to gravity.

When the parachute is deployed, air resistance between the air molecules and the surface area of the parachute generates a drag force, which acts upwards.

If the drag forces exceeds his weight, then his net force will be directed upwards.

If his weight exceeds the drag forces, then the net force on his body will be downwards.

In the case that his drag force, and his weight are equal, there will be a zero net force on him, and he will experience no acceleration.

So, if after he opens his parachute, his acceleration due to gravity decreases to zero, then we can say that this is because the force of air resistance (drag) becomes equal in magnitude to his weight.

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4 years ago