Physics, 01.07.2019 22:30 xoxolovezzz7181
Acertain gasoline engine has an efficiency of 30%; that is, it converts into useful work 30% of the heat generated by burning a fuel. (a) if the engine consumes 0.80 l/h of a gasoline with a heating value of 3: 25 104 kj/l, how much power does it provide? express the answer both in kw and horsepower. (b) suppose the fuel is changed to include 10% ethanol by volume. the heating value of ethanol is approximately 2: 34 104 kj/l and volumes of gasoline and ethanol may be assumed additive. at what rate (l/h) does the fuel mixture have to be consumed to produce the same power as gasoline?
Answers: 3
Physics, 21.06.2019 22:30
Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.
Answers: 1
Physics, 23.06.2019 02:00
Provides most of the energy used in the world today. question 4 options: wind fossil fuel moving water sunlight
Answers: 1
Acertain gasoline engine has an efficiency of 30%; that is, it converts into useful work 30% of the...
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