While at the beach, Lee collected this pile of rocks. How could Lee find out whether the rocks contain the same minerals? 
A) Compare their sizes.
B) Compare their shapes.
C) Compare their masses.
D) Compare their colors.

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above

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.