One of the most efficient engines built so far has the following characteristics: combustion chamber temperature = 1900°C; exhaust temperature = 430°C. 7.0 × 109 cal of fuel produces 1.4 × 1010 J of work in one hour

What is the power output, in hp, of this engine?


5213 hp

Physics & Space Science

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A nuclear power plant is very similar to

A) nuclear bombs, but with more control. B) any conventional power plant, but with uranium as fuel. C) a photovoltaic solar cell power plant. D) all of the above E) none of the above

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Why does Earth have so much more oxygen (O2 ) than Venus or Mars?

What will be an ideal response?

Physics & Space Science

The diameter of an atom is 1.4 × 10-10 m and the diameter of its nucleus is 1.0 × 10-14 m. What fraction of the atom's volume is occupied by its nucleus?

A) 7.1 × 10-5 B) 2.6 × 10-17 C) 5.1 × 10-9 D) 3.6 × 10-13

Physics & Space Science