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The size of a pixel on an electron-multipler CCD camera is 17 microns. We want to find the position of quantum dots, which have a 5 nm diameter, using a 60x 1.4 NA objective. We can more accurately find the center of the dot if its image spans several pixels. Over how many pixels will a green (500 nm) quantum dot appear on the camera? If we want the image of a quantum dot to take up about 3x3 pixels, we can build an optical system to magnify the image. What magnification should it have?
A wire loop of radius 0.40 m lies so that an external magnetic field of magnitude 0.40 T is perpendicular to the loop. Find the magnitude of the average induced emf in the loop
explain how much charge is on each plate. What is the work done by the field on the electron.
You are practicing throwing darts in your dorm. You stand 3.33 m from the wall on which the board hangs. Calculate the time of flight of the dart
Two masses of 4.00 kg each, connected by a string, slide down a ramp making an angle of 45° with the horizontal. The coefficient of kinetic friction between m1 and the ramp is 0.33. The coefficient of kinetic friction between m2 and the ramp is 0...
Assume that an initially stationary gold nucleus remains motionless during a head-on collision with an 8.3 MeV alpha particle, What is the actual recoil speed of the gold nucleus after that elastic collision
Spark plugs should be tightened to a specified torque of 13.8Nm. You have a wrench that is 0.25 m long, What force must you exert on the wrench
A soccer player kicks a rock horizontally off a 39.0-m-high cliff into a pool of water. If the player hears the sound of the splash 2.97 s later, what was the initial speed given to the rock? Assume the speed of sound in air is 343 m/s.
How much heat flows from 1.00 kg of water at 42.0°C when it is placed in contact with 1.00 kg of 16°C water in reaching equilibrium
The velocity-time graph of part of a cyclist's trip consists of a straight line between v = 24.0 m/s at t = 13.0 s and v = 0 at t = 25.0 s
Decreasing the resistance of an ammeter's shunt resistance a.) allows it to measure a larger current at full scale deflection. b.) converts it to a voltmeter. c.) allows it to measure a smaller current at full scale deflection. d.) enables more curre..
You are designing a hydraulic lift for an automobile garage. It will consist of two oil-filled cylindrical pipes of different diameters. What should be the diameter of the pipe under the platform
Mary needs to row her boat across a 100-{rm m}-wide river that is flowing to the east at a speed of 1- {rm m/s}. Mary can row the boat with a speed of 2- {rm m/s} relative to the water.
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