Module 1 Problem 6, 9, and 10

(10%) Problem 6: The classic Millikan oil drop experiment was the first to obtain an accurate measurement of the charge on an electron. In it, oil drops were suspended against the gravitational force by a vertical electric field.\f50% Part (a) Given that the oil drop is 1.1 um in radius and has a density of 905 kg'me, find the weight of the drop in N. Grade Summary W = Deductions 046 Potential 10046 tan() 7 HOME Submissions Attempts remaining: 10 cotan() asin() acos( E 4 5 6 (596 per attempt) atan( acotan() zinho 1 3 detailed view coshO tanh() cotanh( END ODegrees O Radians BACKSPACE CLEAR Submit Hint Feedback I give up! Hints: 096 deduction per hint. Hints remaining- 1 Feedback: 09% deduction per feedback.50% Part (b) If the drop has a single excess electron, find the electric field strength needed to balance its weight. Grade Summary E = Deductions 046 Potential 10096 sin( tan() II 7 HOME Submissions Attempts remaining: 10 cotan() asin() acos() (596 per attempt) atand acotan() sinh( 1 2 3 detailed view coshO tanh() cotanho 0 END Degrees O Radians BACKSPACE IMIL. CLEAR Submit Hint Feedback I give up! Hints: 096 deduction per hint. Hints remaining: 2 Feedback: 09% deduction per feedback.(10%) Problem 9: An electron is orbiting a nucleus which has a charge of 17e, under the action of the Coulomb force at a radius of 1.22 x 10"10 m.Calculate the angular velocity of the electron, in radians per second. Grade Summary Deductions 046 Potential 10046 sin( COBO) tan() 7 HOME Submissions Attempts remaining: 10 cotan() asin() acosQ F (50% per attempt) atan( acotan() sinh( 1 2 3 detailed view cosh( tanh() cotanh( 0 END O Degrees O Radian: BACKSPACE CLEAR Submit Hint Feedback I give up! Hints: 096 deduction per hint. Hints remaining: 2 Feedback: 09% deduction per feedback.(10%) Problem 10: A proton enters the uniform electric field produced by the two charged plates shown below. The horizontal extent is indicated in the drawing. and the vertical extent is exaggerated for purposes of illustration. The magnitude of the electric field is 4.6x105 N/C, and the speed of the proton when it enters is 1 2x10' m/s.\f50% Part (a) At the point where the proton is exiting from the gap between the plates, its path has been deflected by a distance, d, as indicated on the drawing in the problem statement. Enter the correct value for d, expressed in millimeters. d = Grade Summary mm Deductions 096 Potential 100 9% sin() cost tan( 7 HOME Submissions Attempts remaining 10 cotan() asin( acos() F 5 6 (596 per attempt) atan() acotan() sinh() 1 2 3 detailed view cosh() tanh() cotanh() END O Degrees O Radians BACKSPACE CLEAR Submit Hint Feedback I give up! Hints: 09% deduction per hint. Hints remaining: 1 Feedback: 096 deduction per feedback.&50% Part (b) At the point where the proton is exiting from the gap between the plates, its path has been deflected by an angle, @, as indicated on the drawing in the problem statement. Enter the correct value for d, expressed in degrees. Grade Summary 0 = Deductions 096 Potential 1009% sin() cos0 tan( HOME Submissions Attempts remaining 10 cotan() asin() acos() F 5 6 (596 per attempt) atan() acotan( sinh() 1 2 3 detailed view cosh() tanh() cotanh() 0 END O Degrees O Radians BACKSPACE CLEAR Submit Hint Feedback I give up! Hints: 09% deduction per hint. Hints remaining: 1 Feedback: 096 deduction per feedback