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The illumination of an object by a light source is directly proportional to the strength of the source and inversely proportional to the square of the distance from the source. If two light sources, one three times as strong as the other, are placed 10 ft apart, where should an object be placed on the line between the sources so as to receive the least illumination?
A diesel engine performs 2200J of mechanical work and discards 4300J of heat each cycle. A) How much heat must be supplied to the engine in each cycle? B) What is the thermal efficiency of the engine?
In outer space, a constant net force of magnitude 140N is exerted on a 30.4kg probe initially at rest. What acceleration does this force produce in m/s2
While following a treasure map, you start at an old oak tree. You first walk 825m directly south, then turn and walk 1.25 km at 30.0 west of north, how far will you walk
the label on a soft drink states 15.fl oz (444g) provides 220 kcal. The drink is cooled to 15degree Celsius before it's consumed. Find net energy content of drink
A mass sitting on a horizontal, frictionless surface is attached to one end of a spring; the other end is fixed to a wall. 3.6 J of work is required to compress the spring by 0.1 m. Find the value of the mass
Suppose you are riding a stationary exercise bicycle, and the electronic meter indicates that the wheel is rotating at 9.1 rad/s, For how many minutes have you been riding your bike
The distance between a proton and an electron is 1m. Calculate the electric force and gravitarional force between them
The block is spun at 50 , then the temperature of the rod is slowly increased. When the wax melts, the block slides out to the end of the rod. Illustrate what is the final angular velocity?
A 190 kg block is pulled at a constant speed of 4.4 m/s across a horizontal floor by an applied force of 138 N directed 37° above the horizontal. Illustrate what is the rate at which the force does work on the block?
A 3 kg block slides along a frictionless surface at 1.0 m/s. A second block, sliding at a faster 5.0 m/s, What is the mass of the second block
Calculate the magnetic field inside a solenoid and the energy stored within the coil given the following information: I = 6A, Number of turns = 200
A 743 pF capacitor is charged to 130 V and then quickly connected across a 172 mH inductor.What is the resulting frequency of oscillation
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