Abus travels 50 km south for 30 minutes and stops for 15 minutes. then it travels 20 km for 15 minutes. what is the average velocity of the bus for its total trip? 90km/hr 93 km/hr 70 km/hr 35 km/hr

The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

A2000 kg car is rounding a curve of radius 200 m on a level road. the maximum frictional force the road can exert on the tires of the car is 4000 n. what is the highest speed at which the car can round the curve?