Molarity? what is it

A tennis player hits a ball 2.0m above the ground. The ball leaves his racquet with a speed of 20m/s at an angle of 5.0 degrees above the horizontal. The horizontal distance to the net is 7.0m and the net is 1.0m high.

A person who has a mass of 55 kg is standing in an elevator which is accelerating downward. Acceleration due to gravity is 10 m/s2. a) At what rate (in m/s2) must the elevator accelerate for the person to feel weightless

Low-frequency red light is used in dark rooms because it does not expose the film. This is because the red light has a low

A helicopter is hovering at an altitude of 200m above the surface of the lake. A speaker on the helicopter is sending out sound waves which are reflected from both the surface of the water and bottom of the lake.

Gas is confined in a tank at a pressure of 12.0 atm and a temperature of 26.5° c. If two-thirds of the gas is withdrawn and the temperature is raised to 89.0°C, what is the pressure of the gas remaining in the tank?

What is the most advanced life form on earth

Which EM wave is about the size of humans?

Describe how the Catapult works?

Newton's third law of motion states that the force pair acting on different objects consist of two forces that

While working on her science fair project Venus connected a battery to a circuit that contained a light bulb. Venus decided to change the light bulb to a higher resistance, but she wanted to keep the current the same.