What is the tendency of a material to oppose the flow of charge?

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant