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A laser emits at 424nm in a single pulse that lasts .500 x10-6s. The power of the pulse is 2.80 MW. If we assume that the atoms contributing to the pulse underwent stimulated emission only once during 0.500 x10-6s, how many atoms contributed?
A uniform board is leaning against a smooth vertical wall. The board is at an angle above the horizontal ground. The coefficient of static friction between the ground and the lower end of the board is 0.666. Find the smallest value for the angle ?, s..
A 13.5?F capacitor is connected to a power supply that keeps a constant potential difference of 26.0V across the plates. By how much did the energy change during the insertion
what types of everyday materials have properties of both solids and liquids?what solids may be mistaken for liquids and
A 4.00 kg block slides down a frictionless inclined plane with an acceleration 3.00m/s2. What is the angle of the incline above horizontal
Sixty identical drippers, each with a hole of diameter 1.00 mm are used to water a yard. how fast the water is coming out the drippers
A 20kg box slides 45m from the top down to the bottom of an incline that is 10 degrees to the horizontal. How much work is done by the force of gravity on the box
Before starting this problem, review COnceptual Example 3. Suppose that hail described there bounces off the roof of the car with a velcity of +15 m/s. calculate the force exerted by the hail of the roof
A voltage V is applied to the primary coil of a step-up transformer with a 3:1 ratio of turns between its primary and secondary coils. A resistor R connected to the secondary dissipates a power P = 100 W. How much power is dissipated by the same r..
A noisy grinding machine in a factory produces a sound intensity of 1.40 multiply.gif 10-3 W/m2. Calculate the decibel level of this machine
Green light at 532 nm lights a diffraction grating with 800 lines per cm. Diffraction pattern is on screen 7.5m away. Calculate distance between the diffraction peaks on the screen
A 535 g ball swings in a vertical circle at the end of a 1.4 m-long string. When the ball is at the bottom of the circle, the tension in the string is 22 N. Illustrate what is the speed of the ball at that point?
A small thin coil with N2 loops, each of area A2, is placed inside a long solenoid, near its center. The solenoid has N1 loops in its length l and has area A1. Determine the mutual inductance as a function of ?, the angle between the plane of the s..
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