PLEASE HELP ME I NEED THIS Two ice skaters are at rest, Andy
and Brenda. Andy has a mass of
62.5 kg. They push off each other.
After, Andy moves 1.59 m/s east,
while Brenda moves 2.22 m/s west.
What is Brenda's mass?

Which articulations allow for greatest range of motion?

How does an observation about an object differ from an inference about that object

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 =