As the intensity of your physical activity increases,
your heart rate will go down. true or false

What type of electromagnetic wave is used in security pens? a. x-rays c. microwaves b. visible light d. ultraviolet radiation select the best answer from the choices provided

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Order the sequence of ideas that lead to marie curies discovery of radioactive elements number the events in chronological order starting with the oldest