(() Calculate the following:
Carbon 14 has a half-life of 5,730 years. The sample weighs 210 grams.

a. After four half-lives, how many grams of carbon-14 remains?

b. After four half-lives, how many years have elapsed?

(Please answer questions a and b.)

where's the diagram?

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)