Phosphorus-32 is a radioisotope with a half-life of 14.3 days. If you start with 4g of P-32, how many grams will remain after
57.2 days?

While standing outdoors one evening, you are exposed to the following four types of electromagnetic radiation: yellow light from a sodium street lamp, radio waves from an am radio station, radio waves from an fm radio station, and microwaves from an antenna of a communications system. rank these type of waves in terms of increasing photon energy.

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.

The ability to make things happen is also called a. heat b. force c. matter d. energy