A brick is dropped from 100m up. Find it's impact velocity and air time.

The nucleus of a copper atom has 29 protons and 35 neutrons. What is the total charge of the nucleus?

The path that a body follow as it travels around another body in space is its

A hot air balloon of total mass M (including passengers and luggage) is moving with a downward acceleration of magnitude a. As it approaches a mountain, the captain needs to accelerate upwards.

A car advertisement states that a certain car that Emily Miller love can accelerate from rest to 70km/h in 7 seconds. Fine the car's average accelerate

Sort the chemical equations based on the chemical reactions they represent. *water → hydrogen + oxygen *iron + oxygen → iron oxide *sodium + chlorine → sodium chloride *sulfur + oxygen → sulfur dioxide *potassium + chlorine → potassium chloride

Part of the suns energy that reaches the Earths surface is absorbed by land and water as heat. The earths surface then releases heat back into the atmosphere Which of the following is true about this solar energy that is absorbed and released by

When Emeka was first training his dog, Smooches, to heel he would give Smooches a treat when she stayed close during walks. Now Smooches stays right by Emeka's side, even when she is not on her leash. In this case, a.

What must vectors have in common in order to be added?

After one species disappears the other species in the ecosystem ...

A helicopter flying at a distance of 20.0 km from a radio transmitter receives a signal of intensity 35.1 μW/m2. A) Find the magnitude of the electric component of the signal at the helicopter's location.