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BigorU [14]
3 years ago
7

What is the main reason the chemical energy of a fuel is never entirely converted to mechanical energy in an engine?

Physics
1 answer:
IgorLugansk [536]3 years ago
6 0

Answer: Option A) Some of the energy is lost as heat

Explanation:

Energy conversion is not always 100% accurate. In engines, due to the friction generated as machine parts roll over another some of the chemical energy of the fuel is lost as heat. That is why machine parts are lubricated to reduce friction, and then energy loss.

Thus, 100% chemical energy does not yield 100% mechanical energy, as some are lost as heat.

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Arrange the following types of electromagnetic radiation in order of increasing (lowest to highest) frequency from left to right
algol13

Electromagnetic radiation in order of increasing (lowest to highest) frequency is Radio waves < Green visible light < UV radiation.

<h3>What is Frequency?</h3>

This is defined as the rate at which something occurs or is repeated over a particular period of time. The unit of frequency is referred to as Hertz.

Electromagnetic radiations with increasing frequency can be seen below:

Radio waves, microwaves, infrared waves, visible light, ultraviolet radiations, X rays, γ rays.

Read more about Frequency here brainly.com/question/254161

4 0
3 years ago
NUMBER 8. NOWWWWWWWW
ss7ja [257]

Torque =  r x F

|F| =  mg =  60 * 10 N = 600 N ( assuming g ~ 10m/s^2)

distance of fulcrum = torque / Force = 90/600 m = .15 m.

7 0
3 years ago
Friction occurs when microscopic hills and valleys stick together<br><br> true or false
Reika [66]

Answer:

true

Explanation:

Friction occurs because no surface is perfectly smooth. Rougher surfaces have more friction between them. Heavier objects also have more friction because they press together with greater force. Friction produces heat because it causes the molecules on rubbing surfaces to move faster and have more energy.

4 0
3 years ago
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While passing through a human cell, an x-ray photon interacts with and inactivates the cell’s master molecule. What is the conse
Yuliya22 [10]

Answer:

Cell Death

Explanation:

Cell death is defined as the biological process which ceases the function of the cell to carry out. This can be caused due to the formation of new cells in place of old cells.

Or it can be cause due to some serious disease or may be caused due to the injury or due to the death of that organism to which these cells belong.

And another case is that when X-ray photon interact with the human cell while it passes through the cell, it   will damage the cell and cease it to function well and a more drastic condition occurs and that cell become dead.  

3 0
3 years ago
A pulse of ultrasound is sent into the womb. It travels at a speed of 1500m/s in soft tissue and is reflected off the skull of t
erma4kov [3.2K]
D=vt use this equation to get the depth of the skull
8 0
3 years ago
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