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A stamp collector uses a lens with 7.3 cm focal length as a easy magnifier. The virtual image is produced at the normal near point (25 cm).
a) How far from the lens must the stamp be placed?
b) What is the expected angular magnification?
Treat a Boron atom as 5 protons at the origin, 2 electrons spread uniformly on a shell (radius 13.2[pm] centered on the origin) , 2 more electrons spread on a shell (radius 105.8[pm] centered on the origin), and its outer electron at x= 211.6 pm.
how do the phase angle and current change as the resistance changes in a circuit where the frequency stays constant?
suppose that you are swimming in a river while a friend watches from the shore. in calm water you swim at a speed of
Suppose you measure the terminal voltage of a 3.260 V lithium cell having an internal resistance of 5.50 by placing a 1.00 kvoltmeter across its terminals, Find the actual terminal voltage to the nearest 0.01 V
Hair dryer draws a current of 9.2a. How long does it take 1.9*10^3 C of charge pass through? How many electrons does this represent.
An electron is released from rest in a uniform electric field ofmagnitude 2.35 x 104 N/C. Calculate the acceleration ofthe electron. (Ignore gravitation.)
A copper (Young's mudulus 1.1 x 10^11 N/m2) cylinder and a brass (Young's mudulus 9.0 x 10^10 N/m2) cylinder are stacked end to end, Find the amount by which the length of the stack decreases
A 1.25kg- ball begins rolling from rest with constant angular acceleration down a hill. how long will it take to make the next complete revolution
question one method of determining the refractive index of a transparent solid is to measure the critical angle when
A car is parked 21.0 m directly south of a railroad crossing. A train is approaching the crossing from the west, What frequency does the car's driver hear when the horn blast reaches the car
A cart mass M moves on a frictionless track. It is attached to a string, which goes over a pulley wheel & has a mass m hanging from it. At t=0 s the cart starts from rest & accelerates. Find the tension in the sting & acceleration of the cart.
A hydrogen atom, initially at rest, emits an ultraviolet photon with a wavelength of = 121 What is the recoil speed of the atom after emitting the photon
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