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A slide projector has a lens of focal length 150. mm. An image 100. cm × 100. cm is formed of a slide whose dimensions are 50.0 mm × 50.0 mm. How far from the lens must the screen be placed?
A 581-{\rm N} physics student stands on a bathroom scale in an 821-{\rm kg} (including the student) elevator that is supported by a cable. Find the magnitude of the acceleration of the elevator
Ilustrate what is the magnitude of the torque about his shoulder if he holds his arm in each of the following ways? Straight out to his side, parallel to the floor.
In a double-slit experiment, slits separated by 1.240e-4 m are illuminated by a coherent 571 nm light source. What is the angular position of the first bright fringe
A large capacitance of 1.20 mF is needed for a certain application. Calculate the volume of Teflon alone in the capacitor
A double convex lens (convex on both sides) is made of glass with an index of refraction of 1.65. What is the magnitude of the larger radius
The drawing shows a block at rest on an incline. What is the static frictional force that acts on the block
Two equally charged insulating balls each weigh 0.26 g and hang from a common point by identical threads 25 cm long. find the magnitude of the charge on each ball
What is the change in entropy for the system. How much force must be applied to climb the hill at the same speed and same air resistance.
Two long, parallel wires are separated by a distance of 2.50cm . The force per unit length that each wire exerts on the other is 3.20×10?5N/m, determine the current in the second wire
Consider a closed triangular box resting within a horizontal electric field of magnitude E = 7.40x10^4 N/C, below.
You close the top of your straw with your thumb and lift the straw out of your glass containing Coke. How large is the error (in per cent) if you neglect the air in the straw
A positive charge of magnitude Q1 = 6.5 nC is located at the origin. A negative charge Q2 = -6.5 nC is located on the positive x-axis, Calculate the angle in degrees of the electric field at point P relative to the positive x-axis
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