1.- A sprinter must average 24mi/h to win a 100 m dash in 9.30s. What is the wavelength at this speed if his mass is 75 kg?
2.- According to the Heisenberg uncertainty principle, if the uncertainty in the speed of an electron is 2.5x103m/s,the uncertainty in this position (in m) is at least (mass electron= 9.11x10-28g):