La exprecion x(t)= (4t-2)i corresponde a la funcion del tiempo de un automovil que se mueve en linea recta halla: la velovida y aceleracio en funcion del tiempo y explicar a que tipo de movimiento corresponde

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

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 =