Which of the following statements is true of an isolated systems

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

What are the necessary conditions for fusion?

One number is said to be an "order of magnitude" larger than another number if choose one: a. it is 10 times larger. b. it is 5 times larger. c. it is 3 times larger. d. it is 100 times larger. e. it is 2 times larger.