1. A mass of 50g is applied to a spring which stretches by 17mm. What is the spring constant? 2. How much energy does the spring in Q1 above store?
3. A catapult with a spring constant of 500N/m is stretched 30cm. How fast can it shoot an arrow with a mass of 50g?

Asubject in a clinical research trial experiences a serious, unanticipated adverse drug experience. how should the investigator proceed, with respect to the irb, after the discovery of the adverse event occurrence? a. do not report the adverse drug experience to the irb since it is a common adverse experience. b. report the adverse drug experience to the irb only if there are several other occurrences. c. report the adverse drug experience as part of the continuing review report. d. report the adverse drug experience in a timely manner, in keeping with the irb's policies and procedures, using the forms or the mechanism provided by the irb.

While the change in blank will remain the same during a collision, the force needed to bring an object to a stop can be blank if the time if collision is blank

By what primary heat transfer mechanism does the sun warm the earth?