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A laser is used in eye surgery to weld a detached retina back intoplace. The wavelength of the laser beam is 514 nm, while the poweris 1.5 W. During surgery, the laser beam is turned on for 0.050 s.During this time, how many photons are emitted by the laser?
An energy-efficient lightbulb, taking in 24.0 W of power, can produce the same level of brightness as a conventional lightbulb operating at power 100 W. The lifetime of the energy-efficient bulb is 10 000 h and its purchase price is $4.20, whereas..
In a muonic atom, the electron is replaced by a negatively charged particle called the muon. What is the shortest wavelength of the Lyman series in a muonic hydrogen atom
In a constant-volume process, 201 J of energy is transferred by heat to 0.97 mol of an ideal monatomic gas initially at 306 K. Find the increase in internal energy of the gas
An AC voltage with an amplitude of 116 V is applied to a series combination of a 151 ?F capacitor, a 129 mH inductor, and a 23.4 ? resistor. Calculate the power factor at this frequency
Using the capacitance determined in part (a),which equals 21 micro F, compute the current in the circuit 6.6 ms after the switch is closed. Assume that the capacitor is uncharged initially and that the emf of the battery is 9.0 {rm V}. Resistance= ..
Assume we have an infinitely long wire carrying a current of 2.50 A. It is bent into an L-shape extending into positive infinities along x- and y- axes. Find out the magnitude of the magnetic field at a point P with coordinates (0.30 m, 0.30 m)
A light beam is incident on heavy flint glass (n 1.65) atthepolarizing angle. Calculate the angle of refraction for the transmitted ray
An electron approaches a potential barrier10 eV high and 0.30 nm wide. If the electron has a 2.0 percentprobability of tunneling through the barrier, what must its energy be
A parallel-plate capacitor has plates of dimension 1.5cm x 3.0cm separated by a 1.5mm thickness of paper, what is the capacitance of this device
A solid wood door 1.00m wide and 2.00 m high is hinged along one side and has a total mass of 44.0 kg. Find the final angular speed of the door
A grinding wheel of radius 0.340m rotating on a frictionless axle is brought to rest by applying a constant friction force tangential to its rim. The constant torque produced by this force is 64.5 N • m. Find out the magnitude of the friction forc..
A train 350 m long is moving on a straight track with a speed of 81.0 km/h. determine how long the train blocked the crossing. Disregard the width of the crossing
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