How much heat do you need to raise the temperature of 150 g of oxygen from -30c to -15c?

Anew product is designed to make plants grow faster. twenty plants are fed the new product and twenty plants are used as a control group. which possible issue might cause an unavoidable error in the study?

If 2 different solids have the same masses but different volumes, how will their densities compare? a. the solids will have the same densities. b. the solid with lower volume will have a higher density. c. the solid with greater volume will have a higher density. d. the solid with greater volume will have double the density of the solid with the lower volume.

In the phenomenon known as the photoelectric effect, electric current will flow when light shines on certain substances.