As you move from left to right across a period the number of valances electrons

A. increases

B. stays the same

C. increase and then decreases

D. decreases

Which of newton's laws best explains why motorists should buckle up?

Which best compares the gravitational force and the strong force?

You walk 20 m north, then 5 meters south. What is your displacement?

The light-gathering capacity of a telescope is dependent on the: A: focal length B: size of human iris C: area of aperture D: magnification

What is the advantage of having nuclear physics?

A refrigerator is a system. The energy input into the refrigerator system (in the form of electricity) is the same as the amount of energy output from the system. Which of the following best describes the energy output of the system?

A 1,120 kg car is travelling with a speed of 40 m/s. Find its energy.

3. Calculate the amount of current through a 45-watt light bulb that is connected to a 120-volt circuit in your home.

Are oranges called oranges because oranges are orange, or is orange called orange because oranges are orange?

An object at rest has no net force acting on it. a. True b. False