Students in a lab were given an unknown sample to find the density of. The volume of the unknown sample was 16.8 ml, the calculated mass of the unknown sample was 134.4. What is the density of the unknown sample? Note: You only have to fill in the numerical answer.

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.