A schedule of partial reinforcement in which the first response after a specified period of time will be reinforced is called a schedule. a. fixed interval b. concrete ratio c. concrete interval d. fixed ratio

To a of 4 x hz is 1. 0. mm nm nm

Suppose that three astronomical objects, 1, 2, and 3 are observed to lie on a line, and the distance from object 1 to object 3 is d. object 1 has four times the mass of object 3, and seven times the mass of object 2. find the distance between objects 1 and 2 for which the net force on object 2 is zero.

In a star, nuclear fusion occurs in the a. photosphere. b. corona. c. radiative zone. d. core.