What is the numeric value of a mole for atoms or molecules?

The radius of the sphere is (4.3+-0.1) cm. the % error in the vol is?

In soccer, When throwing in the ball for a throw-in a player may use one hand like a baseball throw? true or false

In a Little League baseball game, the 145 g ball enters the strike zone with a speed of 17.0 m/s. The batter hits the ball, and it leaves his bat with a speed of 24.0 m/s in exactly the opposite direction.

What is a property of matter that can be measured or observed using the 5 senses

A toy car with a mass of 2kg starts at rest. A spring performs 196 joules of work on the car. What is the toy cars final velocity

Which of the following objects would have the most inertia? A. A sphere with a radius of 5 cm and a mass of 34 grams. B. A sphere with a radius of 4 cm and a mass of 15 grams. C. A sphere with a radius of 8 cm and a mass of 27 grams. D.

A boy slides a book across the floor using a force of five and over a distance of 2M what is the kinetic energy of the book after he slides at assume there is no friction

Where would aliens be if they really do exist here on Earth?

If the mass of an object is 84g and the volume is 12cm3 what is the density

Describe one example of competiton of tropical dry forest