What are the dimensions of a square that has an area of 4cm^2

Which statements about velocity is true A. The symbol for velocity is v B. For velocity you must have a number, a unit and direction. C. To calculate velocity, divide the displacement by time D. The SI unit for velocity are miles per hour

If a lever system has an output force (load) of 20 kg and an input force (Effort) of 100 kg, the mechanical advantage of this lever is: A. 2000 B. 0.2 C. 0.5 D. 5

When you rub a plastic rod with fur, the plastic rod becomes negatively charged and the fur becomes positively charged. As a consequence of rubbing the rod with the fur, A. the rod and fur both gain mass. B. the rod and fur both lose mass. C.

The amount of energy added or removed to change the state of a substance between liquid and gas with no change in temperature

Fossils cannot be used to explain changes in the earth. True or false

The amplitude of oscillation is the maximum distance between the oscillating weight and the equilibrium position.

A runner makes one lap around a 200m track of 25s. What were the runners average speed and average velocity?

Which change occurs when an atom undergoes alpha decay?

An athlete swings a ball, connected to the end of a chain, in a horizontal circle. The athlete is able to rotate the ball at the rate of 8.44 rev/s when the length of the chain is 0.600 m. When he increases the length to 0.

A moving small car has a head-on collision with a large stationary truck 7.3 times the mass of the car. Which statement is true about the direction of the car after the collision if the collision is elastic?