The following data should be used for both Questions 6 and 7. Charge of a proton = 1.6 x 10-19 C Charge of an electron = -1.6 x 10-19 C Mass of an electron = 9.11 x 10 31 kilograms Mass of an proton = 1.67 x 10- 27 kilograms a) What is the speed of a proton that has been accelerated from rest through a potential difference of -1000 V? (1) b) What is the speed of an electron that has been accelerated from rest through a potential difference of 1000 V? (1)