The work done by static friction can be:
A: Positive
B: Negative
C: Zero
D: Any of the others
A: Positive
B: Negative
C: Zero
D: Any of the others
举一反三
- 18. The p-value ____ A: can be any negative value. B: can be any positive value. C: must be a number between -1 and 0. D: must be a number between zero and one.
- Work is taken negative when the work is done by the system and heat is taken as positive when it is transferred into the system. （ ）
- If the current direction of each mesh is the same, the mutual resistance of each mesh equation ( ). A: is always negative B: is always positive C: is always zero D: can be positive or negative
- The values of F can be__ A: Negative B: Positive C: 0 D: Any number
- The sign bits (S) indicate if the temperature is positive or negative: for positive numbers S = 0 and for ______ numbers S = 1. A: negative B: zero C: positive