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77julia77 [94]
3 years ago
10

8. The ratio of output power to input power, in percent?A. work. B. efficiency. C. horsepower. D. conductivity.

Physics
2 answers:
Tema [17]3 years ago
7 0
That ratio is the efficiency of whatever the power went into and came out of. There's no reason the efficiency has to be expressed as a percentage.
BARSIC [14]3 years ago
4 0
The ratio of output power to input power, expressed as a percentage is B. efficiency. 

Efficiency is expressed as a percentage less than 100%, as a machine could never be completely efficient.
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3 years ago
The time T in seconds for a pendulum of length L feet to make one swing is given by Upper T=2\pi \sqrt((L)/(36)). How long is a
Andreyy89

Answer:

3.6ft

Explanation:

Using= 2*π*sqrt(L/32)

To solve for L, first move 2*n over:

T/(2*π) = sqrt(L/32)

Next,eliminate the square root by squaring both sides

(T/(2*π))2 = L/32

or

T2/(4π2) = L/32

Lastly, multiply both sides by 32 to yield:

32T2/(4π2) = L

and simplify:

8T²/π²= L

Hence, L(T) = 8T²/π²

But T = 2.1

Pi= 3.14

8(2.1)²/3.14²

35.28/9.85

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5 0
3 years ago
A 5000 g toy car starts from rest and moves a distance of 300 cm in 3 s under the action of a single constant force. Determine t
sveticcg [70]

Answer:

3.33 N

Explanation:

First, find the acceleration.

Given:

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a = ⅔ m/s²

Use Newton's second law to find the force.

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F ≈ 3.33 N

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Explanation:

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3 years ago
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