16. The density of a substance can be calculated by dividing its energy per volume by its energy per mass. In this case, the energy per volume of diesel fuel is given as 34.9 GJ/m^3 and the energy per mass is given as 41.8 MJ/kg.

First, we need to convert GJ/m^3 to MJ/m^3. 1 GJ = 1000 MJ, so 34.9 GJ/m^3 = 34900 MJ/m^3.

Then, we divide the energy per volume by the energy per mass:

34900 MJ/m^3 ÷ 41.8 MJ/kg = 835.4 kg/m^3

So, the density of diesel fuel is approximately 835 kg/m^3, which is closest to option A: 8.35 x 10^2 kg/m^3.

17. The efficiency of a system is defined as the ratio of the useful energy output from the system to the total energy input. This is because efficiency measures how effectively a system converts input energy into useful output energy. Therefore, the correct answer is option C.

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16. The density of a substance can be calculated by dividing its energy per volume by its energy per mass. In this case, the energy per volume of diesel fuel is given as 34.9 GJ/m^3 and the energy per mass is given as 41.8 MJ/kg.

First, we need to convert GJ/m^3 to MJ/m^3. 1 GJ = 1000 MJ, so 34.9 GJ/m^3 = 34900 MJ/m^3.

Then, we divide the energy per volume by the energy per mass:

34900 MJ/m^3 ÷ 41.8 MJ/kg = 835.4 kg/m^3

So, the density of diesel fuel is approximately 835 kg/m^3, which is closest to option A: 8.35 x 10^2 kg/m^3.

17. The efficiency of a system is defined as the ratio of the useful energy output from the system to the total energy input. This is because efficiency measures how effectively a system converts input energy into useful output energy. Therefore, the correct answer is option C.

Knowee AI · Accepted Answer

16. The density of a substance can be calculated by dividing its energy per volume by its energy per mass. In this case, the energy per volume of diesel fuel is given as 34.9 GJ/m^3 and the energy per mass is given as 41.8 MJ/kg.

First, we need to convert GJ/m^3 to MJ/m^3. 1 GJ = 1000 MJ, so 34.9 GJ/m^3 = 34900 MJ/m^3.

Then, we divide the energy per volume by the energy per mass:

34900 MJ/m^3 ÷ 41.8 MJ/kg = 835.4 kg/m^3

So, the density of diesel fuel is approximately 835 kg/m^3, which is closest to option A: 8.35 x 10^2 kg/m^3.

17. The efficiency of a system is defined as the ratio of the useful energy output from the system to the total energy input. This is because efficiency measures how effectively a system converts input energy into useful output energy. Therefore, the correct answer is option C.

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