Which of these forces cannot act at a distance? A. Gravitational force

B. Magnetic force

C. Friction

D. Electrical force

The belmont principle of beneficence requires that: a. subjects derive individual benefit from study participation. b. potential benefits justify the risks of harm. c. the study makes a significant contribution to generalizable knowledge. d. risks are managed so that they are no > minimal.

What is the largest room in the white house

If you were to measure the distance from earth to saturn, would you use au? why?