Answer to Question #183272 in Physics for kiana

Question

3. In an electrically neutral atom, the number of protons equals the number of __________

A. Electrons B. Neutrons C. Nucleons D. both neutrons and electrons

4. All three objects have a net charge. Objects A and B attract each other. Objects B and C also attract each other, but objects A and C repel each other. Which of the following is a possible combination of the signs of the net charges of these three objects?

I. A is positive, B is positive, C is negative

II. A is negative, B is positive, C is positive

III. A is negative, B is positive, C is negative IV.

A is positive,

B is negative,

C is positive

A. I only B. I and II C. I, II and III

D. III and IV

5. The main difference between gravitational force and electric force is that gravitational force _______________________.

A. is a conservative force

B. is always attractive

C. obeys the inverse square law

D. is proportional to the product of the quantity that causes the force.

Answer 1

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