Magnets are often fitted to the doors of refrigerators and cupboards WHY?

Donna drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 8 hours. When Donna drove home, there was no traffic and the trip only took 4 hours.

Do atoms have mass?

A 0.20 kg stone is dropped (from rest) from a height of 40.0 m above the ground. How far above the ground is the stone when it's velocity is 11.6 m/s [down]?

If you double the net force on an object what was the result on the acceleration be

A hydraulic lift is being designed to lift cars. The input piston has an area of 10 cm2 and can handle a force up to 400 N. The lift must be able to move cars with a mass as large as 1800 kg.

Is Li greater than He on the periodic table?

White light falls on a yellow filter, if: (a) A green filter is placed behind a yellow filter, what is the colour of the light that will emerge from the green filter?

Calculate the energy equivalent in joules of the mass of a proton. [Show all work, including the equation and substitution with units.]

If the weight is 950 newtons, what is the mass?

You are standing against the wall near a corner of a large building. A friend is standing against the wall that is around the corner from you. You can't see your friend. How is it that you can hear her when she talks to you?