What is the number of waves per second in a radio signal?
a. frequency
b. interval
c. recess
d. velocity

An observer that stands still as the electron moves by him, will observe

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.

Both independent and dependent clauses