A wave has a period of 2 seconds and a wavelength of 4 meters calculate its frequency and speed

A baseball of mass 0.143 kg is thrown from the roof of a building 23.1 m above the ground. Its initial velocity is 37.6 m/s at an angle of 45◦ above the horizontal. The acceleration of gravity is 9.81 m/s 2.

A person using an oxygen mask is breathing air that is 33% oxygen. what is the partial pressure of the o2, when the air pressure in the mask is 110 kpa

A liquid mixture of water and alcohol has a density of 900kg/m3. find the mass of alcohol in one litre of the mixture

13. Which statement correctly describes the human heart? A. It has three chambers, and pumps blood directly into veins. B. It has two chambers, and it is composed of cardiac muscle. C. It has three chambers, and it is composed of cardiac muscle. D.

An astronaut weighs 700 N on Earth what is the astronaut's Mass on Earth?

How many earth years does it take mars to orbit the sun

Which represents a system that is almost completely closed?

If many household substances classify as acids or bases what is the ph scale

A protostar forms once the nebular cloud condenses and the core begins

How do whales bats and dolphins use echolocation? A To scare away predators B To attract mates C To orient them selves and find food D To tell animals of there species where they are