Name three devices that use electricity and magnetism to operate.

The superhero Green Lantern steps from the top of a tall building. He falls freely from rest to the ground, falling half the total distance to the ground during the last 1.00 s of his fall. What is the height h of the building?

A block of ice of mass 4.30 kg is placed against a horizontal spring that has a force constant k = 250 N/m and is compressed a distance 2.80 * 10⁻² m. The spring is released and accelerates the block along a horizontal surface.

A mouse of mass 5.0 g spots the corner of a peanut butter sandwich of mass 8.0 g left on an ice rink after a game. Excited, the mouse runs out onto the ice, but immediately begins to slide.

How are electrons arranged in an atom

In order from lowest urgency to highest, which sequence properly ranks the product categories issued by the National Weather Service? Note that not all product categories are issued for all hazard types. A. Watch, Advisory, Outlook, Warning B.

Imagine that you put two objects in a bucket of water. Give an example of an object that has a greater mass but will float

Imagine you fill an insulated cup almost full with chopped or crushed ice, and measure the temperature after a minute or two, once it's all come to thermal equilibrium.

A 23kg block at rest on a flat surface experiences 200 N of friction. What is the coefficient of friction for the surface

Some ideas for 7th grade science fair projects

A mover pushes a 245 kg piano so that it accelerates uniformly from rest to 1.5 m/s in 5.00 s. What is the power delivered by the mover in this time interval? A 55W B 110W C 280W D 540 W