How do we determine the number of protons an element has

Which of the following materials can be used to shield magnetic fields from the inside of a box? (Select all that apply.) A. A box constructed of sheets of steel. B. A box constructed of sheets of plastic. C. A box constructed of sheets of aluminum.

Light incident on a surface at an angle of 45° undergoes diffused reflection. At what angle will it reflect? does it stay at angles less than 45°? here are the options: A. only at angles less than 45° B. only at angles greater than 45° C.

What is the kinetic energy of a ball with a mass of 5kg rolling at 10m/s

A city bus travels 6 blocks east and 8 blocks north. Each block is 100 m long. If the bus travels this distance in 15 minutes, what is the average velocity of the bus (m/s) ?

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

The force on a current-carrying wire is a maximum when the current is moving parallel to a magnetic field. true or false

In 1999, what percentage of 36-month-old toddlers had been toilet trained? 20 percent 40 percent 60 percent 80 percent

Tarzan, in one tree, sights jane in another tree. he grabs the end of a vine with length 20 m that makes an angle of 45â with the vertical, steps off his tree limb, and swings down and then up to jane’s open arms.

Applying the Law of Conservation of Momentum Train car A is at rest when it is hit by train car B. The two cars, which have the same mass, are stuck together and move off after the collision.

Each of the objects above is composed of identical thin sticks of uniformly distributed mass 5.51 kg and length 0.737 m.