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A 40%-efficient car engine accelerates

A 40%-efficient car engine accelerates the 1300 kg car from rest to 20 m/s How much energy is transferred to the engine by
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2. asked by andrea
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An aircraft piston engine starts from rest and accelerates to 1500rpm in 4.95s. This engine through a reduction gearbox drives a
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2. asked by Lisa
3. 680 views
An inventor has developed a new, energy-efficient lawn mowerengine. He claims that the engine will run continuously for more
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2. 97 views
An inventor has developed a new, energy-efficient lawn mowerengine. He claims that the engine will run continuously for more
1. 1 answer
2. 97 views
How does knowing that all engines waste some energy help engineers build a better engine?answers: They will look for ways to
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2. asked by unknown 2.0
3. 35 views
A heat engine is 20% efficient. If it loses 800 J to the cooling system and exhaust during each cycle, the work done by the
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2. asked by Steve
3. 1,160 views
4.28) A. Calculate the horsepower needed for a 1200 kg car to climb to an altitude of 1000 m from sea level in 1 hr.B. If the
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2. asked by Sean Francis C. Nocete
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How much work can a 22 kW car engine do in 60 seconds ifIt is 30% efficient It is 100% efficient
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2. asked by Melissa
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Why is it impossible for a heat engine to be 100% efficient?A) Work cannot be done on a heat engine. B) Some heat is always lost
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2. asked by Iwannaknow
3. 177 views
Why is it impossible for a heat engine to be 100% efficient?a. Entropy always decreases in a heat engine b. Work cannot be done
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2. asked by kricket
3. 110 views