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A camera has a lens (or combination of lenses) like the converging lens that focuses light from objects into real images ona piece of film. an enlarger shines light through a negative, anduses a lens to project a real image of the picture on the negativeon to the plat form where the photographic paper is placed. explain how each of the following will affect your photographs.
a) the negative is placed in the enlarger with half of it covered by a piece of tape on the inside.
b) half of the lens on the enlarger is covered by a piece of paper.
c) the camera lens is replaced by a diverging lens with the same focal length.
Two billiard balls undergo a glancing collision. Before the collision the first ball was traveling east at 2.6 m/s, what is the speed of the first ball after the collision
An unknown amount of current when passed through a resistance of R1 ? develops a voltage of 100 V and when passed through a resistance of R2 ?, How did you arrive at this conclusion
Radioactive isotopes frequently occur together in mixtures. Assume a 400g sample contains, with a half-life of 12 days, and, with a half-life of 4.5 days. If there are firstly twice as many calcium atoms as there are barium atoms, what will be the ra..
A ball with mass m = 0.170 kg and kinetic energy K1 = 2.17 J collides elastically with a second ball of thesame mass that is initially at rest. find the kinetic energy of the first ball after the collision
A plank 2.00 cm thick and 14.9 cm wide is firmly attached to the railing of a ship by clamps so that the rest of the board extends 2.00 m horizontally over the sea below. find the shear modulus of the wood
A spherical object with a radius of 40.0 cm has a net charge of 37.7uC distributed uniformly throughout its volume, Using Gauss's Law, calculate the electric field 71.5 cm from the center of the sphere
A classroom demonstration is done with an Atwood machine. The masses are m1 = 1.0 kg and m2 = 1.14 kg. what is the acceleration of gravity at that place
A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 4.4. find the resulting angular speed of the student and the stool
A 1.0-C charge is 15 m from a second charge, and the force between them is 1.0 N. What is the magnitude of the second charge
As a logging truck rounds a bend in the road, some logs come loose and begin to roll without slipping down the mountainside. What is the friction force on the rolling logs
Two electrons are fixed 2.1 cm apart. Another electron is shot from infinity and comes to rest midway between the two. What was its initial speed
A 3.60 long, 420 steel beams extends horizontally from the point where it has been bolted to the framework of the new building under construction. A 72.0 construction worker stands at the far end of the beam. What is the magnitude of torque about the..
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