Which one of the following statements about proprioceptive neuromuscular facilitation (pnf) is most accurate? it involves a very small amount of resistance. it involves bouncing, repetitive movements. it can cause more muscle soreness than other types of stretching. it is the most common and practical type of stretching.

How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.

The necleus of an atom is made up of what subatomic particles?

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present