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What is the efficiency of a car if you put in 50 units of energy and it gives you 15 units of energy out?
Wiki User
∙ 12y ago
15/50 = 30%
Wiki User
∙ 12y ago
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Kinetic energy of a moving object varies directly with the square of velocity If a car moving at 60mph has kinetic energy 180 units how many units of kinetic energy does the same car have at 20mph?
The "units" are called joules (J), not to be impolite. The answer would be about 19.9809 J.
What is the difference between high efficiency and low efficiency?
Efficiency describes how well a device transfers one form of energy to another form of usefull energy. High efficiency transforms most of the energy with very little loss. Low efficiency only transforms a small amount into usefull energy and the rest is usually lost to heat energy from friction. For example, a car is a low efficiency device because only a small amount (I forget the actual number. Probably around 50%) of the chemical energy in gasoline actually gets converted to energy of moving the car. The rest is lost to air resistance, friction between all the moving parts & and unused heat out the exhaust pipe.
Why does a car that runs fuel cells have a similar overall efficiency to a car that runs on petrol?
A car that runs on fuel cells only has a similar overall efficiency to a car that runs on petrol because a car that runs on fuel cells is designed to not pollute the Earth but you need renewable energy resources to generate the electricity which is like the efficiency of the petrol pollution. That was what I put on my homework anywayz. :)
Why does adding oil increases efficiency?
The purpose of adding oil to a car i to lubricate the engine. if the engine is not lubricated there will be much more friction between gears and friction generates heat. because energy is needed to create heat that energy is taken away from the energy that would be propelling the car forward. this causes the efficiency yo drop.
The efficiency of a car depends on the weight of the car?
Efficiency(weight), or E(w)
How does efficiency matter to car designers?
Efficiency sells!
How can you use efficiency in a sentence?
The efficiency goes to 30 MPH in this car.
What effect if any does this energy transfer have on the overall efficiency of the car engine?
As a "heat engine", a car engine must rid itself of heat to continue. Efficiency of the heat engine depends on the difference in temperature; therefore, as the temperature outside reaches the temperature inside, the engine stops.
How is kinetic friction a negative and positive thing on a car or moving object?
In a car Friction creates Energy losses that result is a loss of mechanical efficiency, and therefore lower gas mileage. On the positive side friction in the Braking System transform energy of motion into HEAT, allowing the car to stop.
What does it mean when The efficiency of an average gasoline powered car is about 25 percent?
It means 25 percent of the energy consumed to power the car is turned into useful energy. So if it is 100% efficient, then you can say that it will go 4 times as fast as a 25% efficient car. (not realistic because there are a lot of other variables)
How do the heights of the hills in a roller coaster allow an empty car to finish the ride?
It gives it kinectic energy
When does gasoline gives off energy?
gasoline is a fuel. It produces energy when the fuel is burned. In your car the spark makes tiny explosions which drive engine pistons up and down, thus moving your car.
