Aspring with spring constant k is anchored to the wall on one side of a hockey rink. a hockey puck is pressed against the spring and then released to slide across the ice. in the process the hockey puck gains a kinetic energy k. derive an expression for the initial compression of the spring x in terms of k and k.

Why do electron microscopes have higher resolving power than light microscopes?

Which of the following statements is true about women and minorities in early psychology? a. in the early 20th century, numerous graduate schools recruited women and minorities to study psychology. b. opportunities in higher education were limited for women and minorities in the early 20th century due to discrimination. c. despite some obstacles, there were numerous employment opportunities for women and minorities. d. women and minorities were often selected to do academic research in an effort to make the field more diverse.

How many times did thomas edison mess up the light bulb