2 years ago

A

Physics

1 answer:

Arada [10]2 years ago

4 0

Answer:

i would think c

Explanation:

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How much power is used in a machine that produces 15 Joules of work in 3 seconds? Use the formula P = W/t.

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P=w/t

w=15
t=3
therefore, 5 watts (b)

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2 years ago

What effort force will be required to lift the 20 N object using the pulley above?

Umnica [9.8K]

Answer:

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Explanation:

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(a) When a battery is connected to the plates of a 8.00-µF capacitor, it stores a charge of 48.0 µC. What is the voltage of the

frosja888 [35]

Answer:

a.6 V

b.24 V

Explanation:

We are given that

a. $C=8\mu F=8\times 10^{-6} F$

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We know that

$V=\frac{Q}{C}$

Using the formula

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b. $Q=192\mu C=192\times 10^{-6} C$

$V=\frac{192\times 10^{-6}}{8\times 10^{-6}}=24 V$

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2 years ago

A 110 V power line is protected by a 15 A fuse. What is the maximum number of 400 W lamps that can be simultaneously operated in

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Answer:

Total number of lamps will be 4

Explanation:

We have given power of the lamp W = 400 watt

Potential difference across the lamp V=110 volt

We know that power is equal to $P=VI$

So $400=110\times I$

$I=3.636A$

Total current is given 15 A

As it is given that lamps are connected in parallel so total current is the sum of current through each lamp

So number of lamp will be $n=\frac{15}{3.636}=4.125$

As the lamp can not be in negative

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Answer:

D. two positively charged objects

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2 years ago