Explain the advantages and disadvantages of using concentric circles in describing the solar system to an elementary school child.

You drive to the city at an average speed of 40 km/h and return at an average speed of 60 km/h. Find your average speed for the entire trip? Explain why the answer is not 50 km/h.

21. What is the formula for displacement?

Which of the following is a possible use for nuclear energy? a. power plants b. weapons c. powering submarines d. all of the above

Why is the charge on a charged sphere distributed uniformly over its surface?

A car travels west for 240km in 4hr. What is the cars velocity?

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