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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.
A billiard ball strikes and rebounds from the cushion of a pool table perpendicularly. What is the average net force (magnitude and direction) exerted on the ball by the cushion
What would be the electric current intercepted by the total surface area of the planet?
A 41 kg ice skater is moving at 4.73 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. Find the force exerted by the rope on her arms
A transformer with a turns ratio (secondary/primary) of 1:14 is used to step down the voltage from a 120-V wall socket to be used in a battery recharging unit.What is the voltage supplied to the recharger?
A car is traveling around a horizontal circular track with radius r = 190.0 m as shown. It takes the car t = 59.0 s to go around the track once. What is the magnitude of the car's acceleration
A piece of copper with a mass of 1.0kg and density of 8900kg/m^3 is suspended from a string and conpietely in a contaner with water. determine the volurm of the piece of copper
Determine the absolute pressure at the bottom of a lake that is 50 m deep. Write yor answer correct to two decimal paces let Patm = 101,300 Pa
A vinyl record plays at 33.3 rpm. Assume it takes 9 s for it to reach this full speed, starting from rest. What is its angular acceleration during the 9 s?
A rescue helicopter lifts a 70.8-kg person straight up by means of a cable. What is the tension in the cable
What is the direction of proton after the collision? What is the direction of carbon atom after the collision.
Block B in the figure weighs 760 N. The coefficient of static friction between block and table is 0.28; angle ? is 27°; Find the maximum weight of block A for which the system will be stationary
Having taken a nap under a tree only 20 m from the finish line, Rabbit wakes up to find Turtle 19.5 m beyond him, grinding along at 1/4 m/s. If the bewildered hare can accelerate at 8 m/s2 up to his top speed of 17 m/s (38 mi/h) and sustain that s..
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