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You're not quite sure of the difference, are you ! ? Come on, tell old Al the truth.

The power output of a car's engine changes, depending on how much you need

at the moment. That's why you have a control on the floor and you keep your

foot on it, so you can make large or small adjustments in the engine power quickly.

I don't know much about cars, but I think I've heard somewhere about a car

with a "300 horsepower" engine. That would be the maximum power that the

engine is capable of, when you push the power-control to the metal and rev

that baby up to screaming.

300 horsepower means 223,800 watts (223.8 kilowatts) of power.

When it's running at that level, it's delivering 223,800 joules of energy every second.

You know how your electric bill shows how many "kilowatt-hours" of electrical energy

you used last month, and that's how many you pay for ? Kilowatt-hours of electric energy

cost anywhere between 5¢ and 30¢ each, and maybe you use a few hundred of them

in your house in a month.

Well, if your engine is screaming and you're burning rubber and you're flying down the

strip and everybody else is eating your dust and you're turning 300 horsepower, then

your engine is delivering a kilowatt-hour of energy every 16 seconds.

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13y ago

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Continue Learning about Physics

How many watts are required to start a car?

The average car requires about 400 to 600 watts of power to start.


How many joules are needed to drive a car 1 mile?

The amount of joules needed to drive a car 1 mile can vary depending on several factors such as the weight of the car, its efficiency, and the driving conditions. On average, it takes about 133,000 to 175,000 joules (30 to 40 kcal) to propel a car weighing around 2,000 pounds for a mile under normal conditions.


What is the effciency of a car's engine when heat input is 2000000 joules and the waste heat is 1500000 joules?

The efficiency of the car's engine is calculated as the ratio of the useful work output to the total heat input. In this case, the useful work output is 500000 joules (2000000 J - 1500000 J) and the total heat input is 2000000 joules. Therefore, the efficiency is 500000 joules / 2000000 joules, which equals 0.25 or 25%.


What is the potential energy in one tank of gas of a Nissan car?

The potential energy stored in a tank of gas for a Nissan car can vary depending on the size of the tank and the type of fuel used. On average, a full tank of gas for a Nissan car can contain potential energy in the range of 300,000 to 400,000 joules.


What is the efficiency of a car's engine when he input is 20000 joules and the waste heat is 15000 joules?

The efficiency of the car's engine is calculated by dividing the useful energy output by the energy input. In this case, the useful energy output would be 5000 joules (20000 input - 15000 waste heat), thus the efficiency would be 5000/20000 = 0.25 or 25%.