Ahelicopter flies 250 km on a straight path in a direction 60° south of east. the east component of the helicopter's
displacement is
km.

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.

Smallest intensity of a stimulus that you can detect 50 percent of the time is

Which best describes the difference between internal and thermal energy?