Which statements about acceleration are true? Check all that apply.
A. Acceleration is found by dividing the change in speed by the
change in time.
B. Acceleration is a vector quantity.
C. The symbol used for acceleration is a
D. The SI units for acceleration are m/s^2

Consider the growth of a 20-nm-diameter silicon nanowire onto a silicon wafer. the temperature of the wafer surface is maintained at 2400 k. assume the thermal conductivity of the silicon nanowire is 20 wm-1k-1 and all its surfaces including the tip are subjected to convection heat transfer with the coefficient h = 1×105 wm-2k-1 and t∞ = 8000 k. when the nanowire grows to l = 300 nm, what is the temperature of the nanowire tip (t (x =

What causes the development of most clouds and precipitation in the atmosphere?

Astudent weighing 700 n climbs at constant speed to the top of an 8 m vertical rope in 10 s. the average power expended by the student to overcome gravity is most nearly