A 98N weight is lifted to a height of 4m. What is its potential energy at this position?

In a system, when potential energy decreases, then entropy also decreases. true false

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot

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 =