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A small object is 10 cm to the left of a converging lens (f = +5 cm), and a second diverging lens (f = -3.1 cm) is 2.8 cm to the right of the first. Find the position and magnification of the final image by calculation.
position=
magnification=
a freezer with a coefficient of performance of 3.88 is used to convert 1.75 kg of water to ice in one hour. how much electrical energy does the freezer use during this hour of operation
A reading on a Geiger counter of 0.23 mrad/h is based on assuming that the measured radiation is due to cesium-137, How many ?-rays does the person's body absorb every second
A small earthquake starts a lamppost vibrating back and forth. find the time constant for the damping of the oscillation
One end of a brass bar is maintained at 305 oC, while the other end is kept at a constant, but lower, temperature. What is the temperature of the bar at a point 0.129 m from the hot end
Two small metallic spheres, each of mass m = 0.25 g, are suspended as pendulums by light strings from a common point, what is the magnitude of the charge on each sphere
If friction and air resistance can be neglected, determine her speed vB when she reaches the horizontal end of the ramp at B.
The height of a helicopter above the ground is given by h = 3.20 t3, where h is in meters and t is in seconds. At t = 1.95s, the helicopter releases a small mailbag. How long after its release does mailbag reach the ground.
A challenge gaining prominence throughout the planet is the increased need for \"green\" or sustainable energy. how much energy does the wind turbine generate
The plates of a 3.1 nF parallel-plate capacitor are each 0.27 m^2 in area. If the plates are separated by a Teflon sheet, how thick is the sheet
A long straight wire of diameter 2.33 mm and length 5.28 meters has a charge of 0.0388 coulomb uniformly distributed along it. Determine the flux through the side of the cylinder
a rocket takes off at an angle of 20deg from vertical. two observers are standing 20 miles away from the lunch site so
A 100 mH inductor whose windings have a resistance of 6.0? is connected across a 15V battery having an internal resistance of 3.0?
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