Which force requires contact?
a. the force exerted by air as an object moves through it.
b. the force produced interactions between electrically charged objects.
c. the force of attraction between two masses.
d. the force produced by interactions between magnetic objects

If a swimmer is traveling at a constant speed of 0.85 m/s,how long would it take to swim the length of a 50m olympic sized pool?

Which region on the map would have been directly affected by the infestation of the boll weevil in the late-19th and early-20th centuries? a) 5 b) 4 eliminate c) 3 d) 2

Analyze the photo below and answer the question that follows. photo by perry quan what kind of service does the facility in the photo above provide, according to christaller's central place theory? a. low-order service b. high-order service c. low-growth service d. specialized-need service