Why is the true surface of a perfect mirror invisible?

How would you write the number 6,500,000,000 in scientific notation? A) 6,5009 B) 6.5 * 1,000,000,000 C) 10 * 6.59 D) 6.5 * 109

An elevator weighing 2.00 x 10 5 N is supported by a steel cable. What is the tension in the cable when the elevator is accelerated upward at a rate of 3.00 m/s2? (g = 9.81 m/s2) Show your work.

If a car travels 500 m in 25 second how fast is it traveling?

The greenhouse effect on which planet makes it the hottest planet in our solar system? A. Mars B. Mercury C. Venus D. Jupiter

Match the following items. 1. solar wind a region on the Sun's surface created by protruding magnetic field lines 2. solar flare a burst of highly charged particles erupting from the surface of the Sun 3. sunspot the state of matter on the Sun 4.

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

Why does a balloon filled with helium rise while a balloon filled with an equal volume of average atmospheric air does not? A. Helium has no mass, but air does. B. Helium increases the balloon's mass more than air. C.

Consider the following controls in an automobile in motion : gas pedal, brake, steering wheel. what are the controls in this list that cause an acceleration of the car?