1. Diesel engine is a common heat engine in industrial and agricultural production. It is known that the efficiency of a certain type of diesel engine is 30%. It can release more heat if 2 kg diesel is completely burned in the diesel engine

one hundred and twenty-four

RELATED INFORMATIONS

1. When a diesel engine consumes 3kg of diesel oil, it can do 450000 useful work to calculate the efficiency of a diesel engine [the calorific value of diesel oil is 330000]
2. Generally, the reason for the highest thermal efficiency of diesel engine is (). A diesel engine has high calorific value. B internal combustion. C compression ignition. D B + C
3. For two diesel engines a and B, the power ratio of a and B is 2:1, the efficiency of a is 25%, and the efficiency of B is 20%. For the same work, the ratio of diesel consumed by a and B is 2:1
4. It costs 5.5 yuan per kilogram of vegetable oil. A barrel of vegetable oil weighs 23 kg. After half of the oil is sold, it weighs 14 kg. How much can this barrel of vegetable oil cost? No equations
5. It costs 5.5 yuan per kilogram of vegetable oil. A barrel of vegetable oil weighs 23 kg. After half of the oil is sold, it weighs 14 kg. How much can this barrel of oil cost?
6. A barrel of oil, even the barrel with oil 120kg, pour out 3 / 4 of the oil, even the barrel still weighs 45kg?
7. A diesel engine has a power of 70kw and a mechanical efficiency of 40%. It is known that the calorific value of diesel oil is 4.2 × 10 ^ 7J / kg. When it works normally, the amount of diesel oil consumed per minute is less Fs/mq*100%
8. When a diesel engine with an efficiency of 40% outputs 66000j of useful work, the amount of diesel consumed__ kg? When a diesel engine with 40% efficiency outputs 66000j of useful work, the amount of diesel consumed is very small_____ The calorific value of diesel oil is 4.3 × 107 J / kg 66000 / 0.4 or 66000 * 0. I'm dizzy.
9. What's the physical meaning of the efficiency of a diesel engine being 25 percent, The efficiency of diesel engine is 25%. What does it mean?
10. The efficiency of diesel engine is higher than that of gasoline engine because the calorific value of diesel engine is higher than that of gasoline engine Is that correct? Why?
11. A 195 type diesel engine consumes 0.2kg diesel per horsepower per hour. The calorific value of diesel is known to be 4.3x10 seventh power J / kg Find out the efficiency of this diesel engine
12. When a diesel engine consumes 3kg of diesel oil, it can do 4.5 * 10 of the seventh power J of useful work, and calculate the efficiency of the diesel engine The calorific value of diesel oil is 3.3 * 10 7 J / kg
13. When a diesel engine consumes 2kg of diesel oil, it outputs 3 * 10 seventh power work to calculate the efficiency of the diesel engine (the calorific value of diesel oil is 3.3 * 10 seventh power J / kg)
14. A barrel of oil uses 45, and then adds 15 kg. At this time, the gasoline in the barrel is exactly 12 times of that in the whole barrel. How many kg of gasoline is this barrel?
15. A barrel of diesel sells 75 kg, which is just 1.5 times of the rest. It costs 1.6 yuan per kilogram of diesel. How much yuan can this barrel of diesel sell?
16. A barrel of diesel oil, the first day to use it 2 / 3 less than 3 kg, the next day to use the remaining 40% more than 3 kg, this is the barrel of 15 kg left How many kilos are there in half a year
17. A barrel of diesel oil is continuously pumped. It weighs 20000 grams late. After half of it is used up, it still earns 65000 grams. How much oil is left in the barrel and how many kilograms are empty?
18. A barrel of diesel oil weighs 120 kg. After 0.75% of the oil is poured out, the remaining oil weighs 45 kg. How many kg does this barrel of diesel oil weigh? Use the equation to solve
19. A barrel of diesel oil weighs 120 kg. After three-quarters of the oil is poured out, there is 45 kg left. How many kg does this barrel of diesel oil weigh?
20. A barrel of oil weighs 120 kg. After half use, it still weighs 65 kg. How many kg of oil is there in this barrel? How many kg of empty barrel?