I know its a lot but these are all the questions I am struggling with and you can take your time solving each one. I will leave a good review when you are done.

Lesson 1: Cathode Rays and Thompson's Experiment 1. In Thomson's experiment on cathode rays, the speed of the cathode ray particles was found to be 4.0 x 10' m/s in a 1.0 x 10*T magnetic field. The corresponding electric field was provided by a charged parallel plate capacitor that had a separation of 2.0 cm. What was the potential difference across the plates? (80 V) 2. If J.J. Thomson had used alpha particles traveling at 5.0 x 10' m/s through a magnetic field of 2.0 T, what would the radius of deflection be? (0.52 m) 3. If the charge to mass ratio of a particle is 1.5 x 10" C/kg and the mass is 2.0 x 1015 kg, what is the charge of the particle? (3.0 x 1010 C) 4. A proton travels through a magnetic field at a speed of 5.60 x 10* m/s perpendicular to the field. If the radius of the arc of the deflected proton is 7.50 mm, what is the magnetic field strength? (0.779 T) 5. Alpha particles travel undeflected through magnetic and electric fields that are perpendicular to each another. The speed of the alpha particles is 7.50 x 105 m/s and the strength of the magnetic field is 0.220 T. What is the electric field strength? (1.65 x 105 V/m) 6. Alpha particles travel through a magnetic field of 0.360 T and are deflected in an arc with a radius of 8.20 cm. What is the energy of each alpha particle? (6.71 x 10-15 ]) 7. In a cathode ray tube an electron reaches a maximum speed of 4.75 x 10' m/s. If the electron accelerated from rest, what is the potential difference across the tube? (6.42 kV) 8. In a cathode ray tube electrons are accelerated from rest by a potential difference of 1.40 kV. If these electrons enter a magnetic field with a strength of 0.0220 T, what is the radius of arc for the deflected electrons? (5.74 mm)Lesson 2: Millikan's Oil Drop Experiment 9. A charged particle with a mass of 40 g is suspended in a Millikan oil drop apparatus that has a separation of 4.0 cm between the charged plates. If the potential difference required for the suspension is 1.633 x 101 V, what is the number of excess electrons on the charged particle? (6) 10. In a Millikan oil drop experiment, five electrons are attached to a drop. The oil drop is placed into an electric field created by parallel plates which are 3.0 cm apart. If the mass of the oil drop is 3.0 pg (picogram), what potential difference is required to cause the oil drop to accelerate upwards at 3.0 m/s'? (1.4 x 103 V) 11. An oil drop, of mass 2.6 x 10" kg, is suspended between two parallel plates 0.50 cm apart, and remains stationary when the potential difference between the plates is 270 V. What is the charge on the oil drop, and how many excess or deficit electrons does it have? (4.7 x 10 13 C, + 3 electrons) 12. A metallic Ping-Pong ball, of mass 0.10 g, has a charge of 5.0 x 10" C. What potential difference, across a large parallel plate apparatus of separation 25 cm, would be required to keep the ball stationary? (49 V) 13. An oil drop weighs (has a force of gravity)3.84 x 10" N. If it is suspended between two horizontal parallel plates where the electric field strength is 1.20 x 10" N/C, what is the magnitude of the charge on the oil drop? (3.2 x 10 19 C, 2 electrons) 14. An oil drop whose mass is 3.50 x 10"s kg accelerates downward at a rate of 2.50 m/s' when placed between two horizontal parallel plates that are 1.00 cm apart. Assuming that the oil drop is negatively charged and that the top plate is positive, how many excess electrons does the oil drop carry if the potential difference between the plates is 5.38 x 10' V? (4.76 x 10 19 C) 15. An electron is accelerated upward at 5.2 m/s' towards the positive plate when released. If the plates are set 15 mm apart, what is the potential difference applied across the plates? (-1.28 x 10-12 V) 16. An oil drop with a mass of 7.20 x 10" kg is moving upward at a constant speed of 2.50 m/s between two horizontal parallel plates. If the electric field strength between these plates is 2.20 x 10* V/m, what is the magnitude of the charge on the oil drop? (3.2 x 10 13 () 17. During a Millikan oil drop experiment, a student records the weight of five difference oil drops. A record is also made of the electric field intensity necessary to hold each drop stationary between the two horizontal parallel plates. Electric Field (N/C] x 105 |1.1 1.8 2.5 3.5 3.8 Weight (N]x10.14 1.7 2.9 4.0 5.6 6.1 a. Using E as the manipulated variable, draw a graph showing the relationship between the weight and the electric field. b. Using only your graph, determine the elementary charge by comparing a physics equation to y=mx+b. Which property of the graph can be compared to the quantity of charge? [about 1.6 x 10 19 C]