If 15kj heat energy is require to raise the temperature of a substance of mass 2kg through 20°C . Calculate the specific heat capacity of that substance.

Complete the statement about memory improvement. ( )involves organizing and breaking down information into easier groups to expand capacity. rehearsal is the verbal repetition of information. these techniques are especially important for the improvement of ( ) memory.

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical