What is the purpose of the lenses in a camera

During each heartbeat, about 80 g of blood is pumped into the aorta in approximately 0.2 s. During this time, the blood is accelerated from rest to about 1 m/s. Part A) What is the average force on the blood during this time? A. 0.08 NB. 0.4 NC.

For a movie stunt, an empty truck with a mass of 2000 kg goes 10 m/s and runs into a stopped car of mass 1000 kg. the truck then keeps moving and pushes the car along with it.

A state in which all of the electrons in an atom have their lowest possible energies.

Who was the powerful and ruthless leader of the soviet union from 1929-1953 who also ordered the great purge in which he had his real and imagined enemies arrested?

According to Newton's second law, the acceleration of an object depends on its and the amount of applied to it.

What is the spine also known as

If a man has a mass of 74 kilograms runs 800 meters in 150 seconds, what is his average momentum?

Two lamps one rated 40W at 220 V and the other 60W at 220 V are connected in parallel to the electric supply at 220V.

A 45.0-kg person steps on a scale in an elevator. The scale reads 460 n. What is the magnitude of the acceleration of the elevator?

The entropy of a hot baked potato decreases as it cools. is this a violation of the increase of entropy principle? explain.