Please answer ~ After 42 days, a 2.0 gram sample of phosphorus-33 contains only 0.25 grams of the isotope. What is the half-life of phosphorus-32? (How long is one half life?)

Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat

Stage in which a typical star has completely stopped fusion

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate