A particular protein sample is found to have 1 atom of iron in its chemical formula. If the mass percent of fe in the compound is 0. 330e, what is the molar mass of the protein?.

Will pushing on a car always change the cars mechanical energy? what must happen for the cars kinetic energy to increases?

As shown in fig. p3.64, a closed, rigid tank fitted with a fine-wire electric resistor is filled with refrigerant 22, initially at 2108c, a quality of 80%, and a volume of 0.01 m3. a 12-volt battery provides a 5-amp current to the resistor for 5 minutes. if the final temperature of the refrigerant is 408c, determine the heat transfer, in kj, from the refrigerant.

Assuming weightless pulleys and 100% efficiency, what is the minimum input force required to lift a 120 n weight using a single fixed pulley?