A wind column with a mass of 1 kg has an initial velocity of 30 m/s before interacting with a wind turbine. After the interaction, the wind has a velocity of 10 m/s. How much energy was transferred from the wind to the turbine?

The freezing and boiling point of a substance changes as the air pressure around it changes. for example, at a lower air pressure (higher altitude) it is easier for water molecules to escape from liquid into the air. in a high altitude city such as denver, colorado compared to a sea-level city such as houston, texas, water

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.