Physics, 12.10.2019 02:30 footboy773

Acar battery can deliver up to 75 amps of current at a voltage of 12 volts. how much power is this?

a. 900 watts
b. 6.3 watts
c. 68,000 watts
d. 11,000 watts
e. 470 watts

Answers: 2

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Answer from: isabelperez063

A.900 watts That would be your correct answer

Answer from: whitewesley124

Answer : Power = 900 watts

Explanation :

It is given that,

A car battery can deliver up to 75 amps of current at a voltage of 12 volts. The power delivered is given by the following relation :

P=VI

P=I^2R

$P=\dfrac{V^2}{R}$

In this case, we use relation (1)

$P=12\ V\times 75\ A$

$P=900\ W$

The correct option is (A) " 900 Watts ".

Hence, this is the required solution.

Answer from: Quest

True.it is better to buy a washer with a higher efficiency rating

Answer from: Quest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

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Acar battery can deliver up to 75 amps of current at a voltage of 12 volts. how much power is this?...

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