1. 2009 Nobel Prize for Medicine Elizabeth Blackburn, Carol Greider and Jack Szostak. “how chromosomes can be copied in a complete way during cell divisions and how they are protected against degradation“.

2. Block, mass m, is dropped onto a stiff spring, which compresses a distance  x 1. If the same mass slides down a frictionless ramp of the same height into the same spring, held along the ramp at angle  then  x 2 = A]  x 1 B]  x 1 /sin  C]  x 1 /cos  D]  x 1 /tan 

3. Where is the force directed in the +x direction? D Where is the magnitude of the force largest? A Where is the force = 0? Choose any correct point. B and C Where is an unstable equilibrium? B

4. 2D Where is the force in the +x direction? B Where is the magnitude of the force = 0? C Choose any correct point. Where is there an equilibrium point? C