Question

Какое количество бензина израсходуется в двигателе внутреннего сгорания,кротые приводит в движение насос,вытягиваящий 4т нефти с глубины 1500м?КПД двигателя 30%

Answer 1

полезная работа А=mgh = 4т*10м/с2*1500м=4000*10*1500= 6*10^7 Дж

КПД = A/An

полная работа An=A/КПД =6*10^7 Дж /0.30 = 2*10^8 Дж

тепло от сгорания бензина Q=An =mq 

масса бензина m = Q/q= An/q=2*10^8 Дж /4.6*10^7 Дж/кг =4.34 кг

ОТВЕТ 4.3 кг

**  если нужен объем бензина V=m/p

Answer 2

Calculation of Fuel Consumption in an Internal Combustion Engine

To calculate the amount of fuel consumed by an internal combustion engine, we need to consider the power output of the engine and its efficiency. In this case, we are given that the engine has an efficiency of 30% and it is used to power a pump that extracts 4 tons of oil from a depth of 1500 meters.

First, let's calculate the work done by the engine to extract the oil. The work done is equal to the force applied multiplied by the distance over which the force is applied. In this case, the force is the weight of the oil being lifted and the distance is the depth from which the oil is being extracted.

The weight of the oil can be calculated using the formula:

Weight = mass x gravitational acceleration

Given that the mass of the oil is 4 tons and the gravitational acceleration is approximately 9.8 m/s^2, we can calculate the weight of the oil:

Weight = 4 tons x 9.8 m/s^2

Now, let's calculate the work done:

Work = Weight x Distance

Given that the distance is 1500 meters, we can calculate the work done by the engine.

Next, we need to calculate the energy input to the engine. The energy input is equal to the work done divided by the efficiency of the engine.

Energy Input = Work / Efficiency

Finally, we can calculate the amount of fuel consumed by the engine. The amount of fuel consumed is equal to the energy input divided by the energy content of the fuel.

Unfortunately, we don't have information about the energy content of the fuel in this case. To provide a more accurate answer, we would need to know the specific energy content of the fuel being used.

Please provide the energy content of the fuel (in joules per liter or another appropriate unit) so that we can calculate the amount of fuel consumed by the engine.