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2 years ago

A perpetual-motion machine can never be built because it is not possible to eliminate...

Physics

2 answers:

bazaltina [42]2 years ago

4 0

The answer is: [C]: "elasticity" .
________________________________________

kykrilka [37]2 years ago

4 0

Answer:

D) Friction

Explanation:

Perpetual Motion machine is that machine which will convert whole input energy into useful work.

So we will say that perpetual motion machine is an hypothetical machine which will be 100% efficient and it will convert whole input energy into useful work without any loss of energy.

we know that efficiency is given as

$efficiency = \frac{output}{Input}$

So in real conditions it is not possible to eliminate frictional force due to which we will not able to get 100% useful work so here in real conditions the efficiency is always less than 100%

so correct answer will be

D) Friction

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Why does the mass spectrum of Br2 contain three signals whose heights are almost in the ratio of 1:2:1? What are the origins of

Eddi Din [679]

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2 years ago

If you could help me out that would be fantastic.?!!!

Volgvan

It's either C. Or B.

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3 years ago

What is the equivalent resistance for a series circuit with three resistors : 5.0 ohms, 2.0 ohms, and 12.0 ohms

vesna_86 [32]

Answer:19ohms

Explanation:

equivalent resistance=5+2+12

equivalent resistance=19ohms

8 0

2 years ago

What is an ideal diode? a. The ideal diode acts as an open circuit for forward currents and as a short circuit with reverse volt

Serhud [2]

Answer:

d. The ideal diode acts as a short circuit for forward currents and as an open circuit with reverse voltage applied.

Explanation:

Ideal diode acts like an ideal conductor. In case of forward voltage it acts like an ideal conductor. However when it is reverse biased then it behaves like an ideal insulator. You can understand it bu considering a switch. When the voltage is forward then ideal diode acts like a closed switch. When the voltage is reverse biased then ideal diode behaves like an open switch.

That is why we can say that the ideal diode acts as a short circuit (higher conduction) for forward currents and as an open circuit ( zero conduction) with reverse voltage applied.

8 0

2 years ago

What is tan -1 (0.52)?

leva [86]

Answer:

-0.80985201682

Explanation:

Couldn't you have used Google???

7 0

3 years ago