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Suppose L1 has a focal length of -5 cm. This is in direct contact with a second lens named L2. If an object is placed 5 cm from the lens combination, the resulting magnification is seen to be M=-10. Find the focal length of the second lens in the combination.
The internal energy of a system increases by 100 J while 800 J of work are performed on it. What was the heat flow into or out of the system
a hospital patient has been given 131i half life 8.04 days which decays at 4.5 times the acceptable level for exposure
A wheel of radius 30 cm is rotating at a rate of 2.0 revolutions every 0.080 s. What is the wheel's frequency of rotation
A certain athlete consistently throws a javelin at a speed of 28meter per second. Find his best distance in meter
The space shuttle releases a satelliteinto a circular orbit 640 km above the Earth. How fast must the shuttle be moving
A 10.0 meter long, 200N ladder rests against a wall frictionless. Determine the coefficient of friction if the person stops 6.00 meter up the ladder
A camera's flash uses the energy stored in a 270µF capacitor charged to 170V. The current in the charging circuit is not to exceed 23mA. What's the resistance in the charging circuit
an ideal gas at 1 atmosphere and 200 k has a volume of 400 cm3. the gas is warmed to 300 k and pressure increased to 2
a barrel contains a 0.120 m layer of oil of density 610 kgm3 floating on water that is 0.290m deep.part a what is the
A sinusoidal ac voltage source in a circuit produces a maximum voltage of 12.6V and an rms current of 7.50mA. Find voltage amplitude
question1take two indistinguishable metallic tumblers a and b. insulate one tumbler say a by wrapping chart paper
A mass m = 6.9 kg hangs on the end of a massless rope L = 2.09 m long. Now a peg is placed 4/5 of the way down the pendulum's path so that when the mass falls to its vertical position it hits and wraps around the peg. How fast is the mass moving at..
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