An isotope has the same number of but a different number of than other atoms of the same element.

A 5kg ball is initially at rest at the top of a hill 10m high. if it rolls down the hill (converting all of its potential energy to kinetic energy), what is the maximum kinetic energy it could have at the bottom of the hill?

Diego is playing basketball. while running at 7 km/h toward a basketball hoop, he throws the ball at the net. the ball travels at 20 km/h. what is the speed of the ball relative to the net?

A 23kg block at rest on a flat surface experiences 200 N of friction. What is the coefficient of friction for the surface

According to the scientific definition of work, which of these best shows that work is being done

The coefficient of linear expansion of iron is 1.0 * 10-5 per C◦. The surface area of an iron cube, with an edge length of 5.0 cm, will increase by what amount if it is heated from 10◦ C to 60◦ C

An astronaut weighs 104 newtons on the moon, where the strength of gravity is 1.6 newtons per kilogram. What would she weigh on Mars?

A chemical bond formed when Adams share three pairs of electrons is A. an ionic bond B. a single bond C. a double bond D. a Triple bond

A 1100 kg car rounds a circular turn of radius 24.6 m. Of the road is flat and the coefficient of static friction between the tires and the road is 0.59, how fast can the car go without skidding

What is the momentum of a 15 kg tire rolling down a hill at 3 m/s? 5 kg • m/s 18 kg • m/s 45 kg • m/s 60 kg • m/s

Which of Newton's laws, when combined algebraically with his law of universal gravitation, can be used to calculate Earth's mass? A) first B) second C) third