(Extra Credit for 5 pts):  A  light spring is placed between blocks of masses m1 and m2 on a frictionless surface, as shown.  The blocks are pushed together, compressing the spring a distance of 15 cm, and held there.  The blocks are then released from rest.  After the blocks lose contact with the spring ends, m1 has a speed of 3 m/s.  What is the force constant, k, of the spring?  Show and explain all work!

Discuss the bifunctional enzyme. What is it? What does it do? How is it regulated by covalent modification in the fed condition in relation to the production of F26P2. Be sure to include all important substrates, products, enzymes involved in the pathway getting to BFE, starting from when the appropriate hormone binds to the cell surface receptor and the end results as it relates to THIS enzyme in the fed state.

Treatment of cells with low doses of radiation results in the release of specific factors outside the cell that seem to be responsible for the biological changes in cells not directly exposed to radiation.  This is known as the _________ __________

A skier with a mass of 60 kg goes over a frictionless circular hill of radius r = 5m.  If the skier’s speed at point A is 6 m/s, what is the normal force of the hill on her at point A?  In your work make a free-body diagram for the skier.  Choose closest answer below.

The act of using another person for one’s own advantage.

A ____________ is a device that connects multiple network devices together and forwards frames between them.

In IPv6, what field is used to indicate what sequence of packets from one source to one or multiple destinations a packet belongs to?

____________ is a network protocol used for securely accessing a remote computer or network device.

UDP provides error checking, but not sequencing.

In UDP, port number ____ is often used for DNS queries.