What will the distance from the point of origin if a car traveled at a speed of 25 km/hr for a time of 1 hour and 15 minutes?

In the first law of thermodynamics, triangle e=q-w, what does q stand for

The air that we breath is made mostly of which gaseous molecule

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.