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levacccp [35]
3 years ago
15

A heat engine: A) converts heat input to an equivalent amount of workB) converts work to an equivalent amount of heat C) takes h

eat in, does work, and loses energy heat D) uses positive work done on the system to transfer heat from a low temperature reservoir to a high temperature reservoir E) uses positive work done on the system to transfer heat from a high temperature reservoir to a low temperature reservoir
Physics
1 answer:
Masja [62]3 years ago
3 0

Answer:

C. Takes heat in, does work, and loses energy heat.

Explanation:

Heat engine is a system makes use of thermal energy (heat) to in order to do mechanical work.

This occurs by converting the heat into mechanical energy. This energy is then used to do work.

The key characteristic of a heat engine is that the substance with which work is done by, goes from a higher temperature to a lower temperature.

Hence, it loses heat as it does work.

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Tom [10]

Answer: Yes, he is exceeding the speed limit

Explanation:

Hi!

This is problem about unit conversion

1 mile = 1,609.344 m

Then the speed limit v is:

v = 75 mi/h = 120,700.8 m/h

1 hour = 60 min = 60*60 s = 3,600 s

v = (120,700.8/3,600) m/s = 33.52 m/s

38 m/s is higher than the speed limit v.

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3 years ago
13) How much mechanical energy does a swinging bowling ball have if it has 250J of kinetic energy and
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Answer: what does a,b,c stand for?

Explanation:

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3 years ago
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The formation of lactic acid in human muscle most closely associated with
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The formation of lactic acid in human muscles is closely associated with intense exertion or activity, during which aerobic respiration that uses oxygen to produce energy cannot be able to match the demand of energy by the muscles. The muscles therefore resort to anaerobic respiration for energy where pyruvate becomes a makeshift hydrogen acceptor rather than oxygen as happens in aerobic respiration. Pyruvate accepts a hydrogen from NADH and becomes reduced to lactate or lactic acid while NADH is oxidized to NAD which is crucial in the formation of energy that is then stored in the form of ATP which is used to re-fuel the muscles to keep them going.
8 0
3 years ago
What type of feeder is a snake? *
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Answer:

slender-bodied non-stinging insect having iridescent wings that are outspread at rest; adults and nymphs feed on mosquitoes etc.

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3 0
3 years ago
A person who weighs 685 N steps onto a spring scale in the bathroom, and the spring compresses by 0.88 cm. (a) What is the sprin
kotykmax [81]

To solve this problem it is necessary to use the concepts of Force of a spring through Hooke's law, therefore,

F = kx

Where,

k = Spring constant

x = Displacement

Initially our values are given,

F = 685N

x = 0.88 cm

PART A ) With this values we can calculate the spring constant rearranging the previous equation,

k = \frac{F}{x}

k = \frac{685}{0.88*10^-2}

k = 77840.9N/m

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3 years ago
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