On ella's fifth birthday, her parents told her she had to stop whining or no one would want to play with her. she tried very hard to not whine. after a while, she decided that she didn't have anything to whine about. this is an example of: a. a token economy. b. learned optimism. c. learned . d. subjective being.

Asatellite component is in the shape of a cube with 10cm edges, has an evenly distributed mass of 2 kg and one bolt hole at each of four corners. if the maximum predicted random vibration environment is 10 grms, what bolt size would be a good choice for restraint? what other factors might drive bolt size besides force/stress?

Which accurately compares concave and convex lenses?

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?