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kykrilka [37]
3 years ago
8

A certain car battery with a 12.0 V emf has an initial charge of 131 A · h. Assuming that the potential across the terminals sta

ys constant until the battery is completely discharged, for how many hours can it deliver energy at the rate of 130 W?
Physics
1 answer:
irga5000 [103]3 years ago
7 0

Answer:

The battery can supply 130 W for 11.75 h

Explanation:

In order to discover the time in wich the battery can supply this energy we need to find how much current is being drawn from it, we do that by using the equation for real power that is P = V*I, since we have V and P we can solve for I as seen bellow:

I = P/V = 130/12 = 10.834 A

We can use this value to find how many hours the power can supply said current. We do that by dividing the current capacity of the battery by the current drawn:

t = 141/12 = 11.75 h

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2 years ago
A spring is compressed by 15 cm when 400 N of force is applied. What is the spring constant of the spring?
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4 years ago
If the plates are pulled twice as far apart, but are kept connected to the battery, the electric field between the plates will b
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Electric field between two parallel plates will be halved as it was before.

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we know that,

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