Anurse counts 72 heartbeats in 1 minute. show that the period and frequency of the heartbeats are 0.83 s and 1.2 hz, respectively.

If steel is more dense that lake water, why can a boat float

Which of these is not a possible type of energy transformation? a. electrical energy into light energy b. sound energy into nuclear energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy

Give an example of a collision in real life. use the law of conservation of energy to describe the transfer of momentum. be sure and discuss the momentum before and after the collision occurs. you will need at least 3 sentences to thoroughly answer this question.