A particle moves in uniform circular motion. The work done on it by the centripetal force is 

Consider two astronauts initially at rest “floating” next to each other in space. The 80 kg astronaut pushes the 100 kg astronaut. How far apart are they when the heavier astronaut has moved 10 meters?

In an inelastic collision involving an isolated system, the final total momentum is

Name the nucleotide that occurs only in DNA (must spell correctly to receive credit)

A truck has four times the mass of a car and is moving with twice the speed of the car. If Kt and Kc refer to the kinetic energies of truck and car respectively, it is correct to say that   [Where Kt= kinetic energy of the truck and Kc is the kinetic energy for the car.]

 If a quantity you calculated had units of kg ∙ m/s, what type of quantity could it be? (There could be more than one correct choice.) A) momentum B) kinetic energy C) work D) impulse E) force

If a cell is placed in a hypertonic solution, what will happen?

EXTRA CREDIT (1 point) Which of the following is an essential amino acid in the cat that is not essential for dogs or humans?

Which of the following is FALSE regarding the sodium-potassium pump? 

) The graphs shown show the magnitude F of the force exerted by a spring as a function of the distance x the spring has been stretched. For which one of the graphs does the spring obey Hooke’s law?   A) Graph a B) Graph b C) Graph c D) Graph d E) Graph e