What happens during one half-life of a radioactive isotope? a. half of the sample undergoes radioactive decay. b. half of the time has passed during which the sample will be radioactive. c. half of the sample becomes radioactive. d. half of the time has passed during which the sample will not change.

Which of the following statements does not explicitly describe a transfer of money a. a ball dropped from a heigh hits the ground with a high speed. b. the collision produced in a nuclear reaction heat up the surroundings. c. a plane increases its air speed from 150 mi/hr to 200 mi/hr. d. the electricity from the power socket causes the fan to turn.

Amarble, a bowling ball, a basketball, and a baseball are rolling across the floor at 10 m/s. which one has the greatest kinetic energy? the marble the bowling ball the basketball the baseball

Which object is most likely represented by a dot?