Who invented the cellphone

What type of radiation constitutes the basis for setting an spf rating

A person walks 12 meters to the west and then 16 meters back to the east. what is the distance covered and the direction of displacement

Name two objects that have a low density.

A 20 g bullet is fired horizontally with a velocity of 250 m/s from a 1.5 kg rifle. If the rifle was held loosely, what would be the recoil velocity?

Light propagating in the glass n1 = 1.65 wall of an aquarium tank strikes the interior edge of the wall with incidence angle 19.0 degrees. What is the angle of refraction in the water?

Which is a branch of Earth science? physics ecology chemistry geology

If a bar magnet is falling through a loop of wire, the induced current in the loop of wire sets up a field which exerts a force on the magnet. This force between the magnet and the loop will be attractive when:

Orange juice has a lower or higher viscosity than chocolate syrup

A plane is sitting on a runway, awaiting takeoff. On an adjacent parallel runway, another plane lands and passes the stationary plane at a speed of 40 m/s. The arriving plane has a length of 40 m.

How much time does it take for a car travelling at 5m/s in 21 metres