How is radioactive elements used for medical diagnosis

Describe the interaction that occurs between two objects with the same electrical charge.

Compare and contrast physical changes with chemical changes.

Asample of air with a volume of 2.20m3 at a pressure of 105 kpa and a temperature of 30c is cooled to 10c and the pressure is reduced to 75.0 kpa. what is the new volume? 6.9 1.34 2.56 43.0 2.88