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Your task in physics laboratory is to make a microscope from two lenses. One lens has a focal length of 2.0cm, the other 1.2cm. You plan to use the more powerful lens as the objective, and you want the eyepiece to be 18cm from the objective.
Part A
What is the magnification of your microscope?
Part B
For viewing with a relaxed eye, how far should the sample be from the objective lens?
Rocket-powered sleds are used to test the human response to acceleration. If a rocket-powered sled is accelerated to a speed of 444 m/s in 1.8 seconds, then what is the acceleration and what is the distance that the sled travels?
A round loop of diameter 12 cm, carrying a current of 0.40 A, is placed inside a magnetic field = 0.20 T + 0.40 T . The normal to the loop is parallel to the unit vector = -0.60 - 0.80 . What is the potential energy of the loop?
A golf ball is shot from a tee, elevated 20.0 m above the green, what will be the speed of the golf ball just before it hits the green, 20.0 m below where it started
The figure shows a device that can be used to measure the speed of a bullet. The device consists of two rotating disks, separated by a distance of d = 0.877 m, and rotating with an angular speed of 88.6 rad/s. The bullet first passes through the left..
A proton is traveling horizontally to the right at 4.10×10^6 m/s. Discover (a) the magnitude and (b) direction of the weakest electric field that can bring the proton uniformly to rest over a distance of 3.10 cm.
a charge of -2.355 microc is located at 3.055 m 4.501 m and a charge of 1.800 microc is located at -2.372 m 0.a find
An airplane is flying at 600 km/h at an altitude of 2.0km. how far away is she from being directly below the airplane
Suppose the end of your finger is charged. (a) Estimate the breakdown voltage in air for your finger. (b) About what surfacecharge density would have to be on your finger at this voltage?
With a single 150-mH inductor in a circuit with a 60 Hz voltage source, a current of 1.6 Amp is measured on an ac ammeter. Find the phase angle between the current and that voltage
A solid block is suspended from a spring scale. Whenthe block is in air the scale reads 34.7 N, when immersed inseawater the scale reads 30.1 N, What is the density of the block
The capacitors are identical except that C2 has a dielectric inserted between its plates. A 210 V battery is connected across the combination until electrostatic equilibrium is established, and then the battery is disconnected.
Two large, parallel, metal plates carry opposite charges. They areseparated by 0.1 m and the potential difference between them is500. V. What is the magnitude of the electric field, if it is uniform inthe region between the plates?
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