Why athelets pushes the earth backwards with his feets and hands just before the race starts

A block of metal has a width of 3.2 cm, a length of 17.1 cm, and height of 3.8 cm. its mass is 1.3 kg. calculate the density of the metal. express your answer to two significant figures and include the appropriate units.

2. Who were the first philosophers to propose that atoms existed? What time period was this?

A pulley is used to lift a heavy mass from the floor to the platform. The IMA of the system is 5 and the AMA is 2.5. What is the efficiency of the system?

What happens when a rubber balloon is rubbed against wool and gains electrons? A. A positive charged is induced on the balloon and the wool acquires a negative charge. B.

If you have a pet that isn't getting nourishment from the food it eats, which organ might have a problem?

What property indicates a star's temperature? A size B color C composition D brightness i forgot lol

Locomotor movement applies to which of the following motions running squatting bending twisting

Which of the following is a feature of the sun's radiation? A. It cannot travel through air. B. It cannot travel through vacuum. C. It is made up of rays of the same frequency. D. It is made up of rays of different wavelengths.

determine the pressure exerted on the surface of a submarine cruising 175 ft below the free surface of the sea. assume that the barometric pressure is 14.7 psia and the specific gravity of seawater is 1.03.

9. An astronaut of mass 90 kg walks in space outside her spaceship and receives a 30-N force from a nitrogen spurt gun. What acceleration does she experience?