How does the matter and energy in a system naturally change over time?

A. It increases in energy.

B. It becomes more spread out.

C. It becomes more efficient.

D. It decreases in entropy.

Two charged particles are located on the x axis. The first is a charge 1Q at x 5 2a. The second is an unknown charge located at x 5 13a. The net electric field these charges produce at the origin has a magnitude of 2keQ / a2.

Select the correct answer from each drop-down menu. Balloon B is negatively charged. B Balloon A is charged. If balloon A approaches balloon C, there'll be a force of charged, and balloon C is between them.

What type of road surface provides the best friction? a. dirt road b. dry concrete road c. icy road?

A commonly used unit of electrical energy.

One number is three times another. Their sum is 144. What are the numbers?

What will most likely happen if a light wave moves through a solid?

Ben franklin showed that 1 teaspoon of oil would cover about 0.50 acre of still water. if you know that 1.0 x 104m2 = 2.47 acres, and that there are 5.0 cm3 in a teaspoon, what is the thickness (in cm) of a later of oil?

Which of the following are indicators of chemical changes (choose all that apply): 1. A solid is formed 2. Heat is released or absorbed 3. A gas is released 4. Light or Sound is Produced 5. State of Matter changes 6. A color change takes place 7.

How long do your guests have to wait until the steaks are ready?

Newton discovered that gravity behaves differently in space than it does on Earth. true or false?