world class speed skaters can skate a 3,000 meter course in about 4 minutes. what is their average speed for this course?

An electrical motor spins at a constant 2035 rpm. if the armature radius is 5.862 cm, what is the acceleration of the edge of the rotor?

Explain how energy, time, and power are related.

What is the correct definition of pressure? a) force per volume b) gravity per unit c) force per unit area d) weight of the atmosphere

5) Students use a balance to determine the mass of a marble is 7.5 grams. A graduated bottle contains 10.0 milliliters of water.

The coefficients in the following reaction 2Al2O3 → 4Al + 3O2 add up to 7. True or False?

What happens if a hypothesis is not supported?

a group of elements that stretch bend and conduct heat and electricity

A rectangular block has dimensions 2.9 cm x 3.5 cm x 10.0 cm. the mass of the block is 615.0 g. what is the volume and density of the block? (answer it with correct numbers of significant figures)

Which of the following are products of cellular respiration? Sunlight Oxygen ATP Water Carbon Dioxide

Do magnetic field lines ever start or end anywhere?