Molecules like dna may be stretched and are well modeled as springs. an optical trap can pull with a maximum force of 11\; fn11fn (femto-newtons) and can stretch a dna molecule by 0.06\; \mu m0.06μm . what is the spring constant of the molecule?

Answer quickly (15 points) a comet is approaching earth. describe earth’s gravitational pull as the comet gets closer to it. a. remain constant b. increase c. decrease d. reversed

Which are examples of projectile motion? choose all that apply a. a soccer ball rolling across the ground in the northeast direction b. a car turning a corner, so it is heading south c. a javelin flying through the air d. a tennis ball lobbed over the net

Asmall 21 kilogram canoe is floating downriver at a speed of 1 m/s. what is the canoe's kinetic energy?