Compare the two numbers using <, >, = 5 x 10^2 or 500

2 x 10^7 or 7 x 10^3

6 x 10^3 or 5 x 10^4

5 x 10^5 or 3 x 10^7

4 x 10^2 or 4000

6 x 10^3 or 6000

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Will you chech and finish these for me, because i am stumped with them.

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.