Decide which of the unknown quantities are the target variables. check all that apply. view available hint(s) check all that apply. u′: the final gravitational potential energy xmax: the maximum compression of the spring δuint: the change in the internal energy of the package and incline fs: the static friction force δd: how close the package is to its original position fk: the kinetic friction force n: the normal force d′: the final position of the package

Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)

Which of the choices below is one of the primary gases found in the atmosphere? a. helium b. carbon dioxide c. nitrogen d. argon

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.