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A certain type of laser emits light that has a frequency of 5.2x1014Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 2.7x 10-11 s.
a) How many wavelengths are there in one pulse?
b) the light enters a pool of water, the frequency of the light remains the same, but the speed of the light slows down to 2.3x 108m/s. How many wavelengths are there now in one pulse?
The generator at a power plant produces AC at 29,000 V. A transformer steps this up to 305,000 V for transmission over power lines, how many turns must there be in the output coil
A concave spherical mirror has a radius of curvature of 7.00cm. Calculate the size of the image
A sled slides without friction down a small, ice covered hill. If the sled starts from rest at the top of the hill, its speed at the bottom are 7.50 m/s. On the second run the sled starts with a speed of 1.50m/s at the top. When it reaches the bottom..
A sheet of glass (n = 1.50) is coated with a 500 nm thick layer of cubic zirconia (n = 2.18). How many phase changes do the reflected rays undergo
A particle moves along the x-axis. Its position is given by the equation x= 2+3t-4t2, with x in meters and t in seconds. Determine its position when it changes direction
A driver travels northbound on a highway at a speed of 25.0m/s. What frequency does the driver observe as the police car approaches
The engine of an aircraft propeller delivers an amount of power 171hp to the propeller at a rotational velocity of 2360 rev/min the torque= 516 Nm, How much work does the engine do in one revolution
The total magnetic field at the origin due to the current-carrying wires has the magnitude 2 mu0I1/(2pia). The current I2 can have either of two possible values.Find the value of I2 with the smaller magnitude, stating it in terms of I1 and giving i..
A tank whose bottom is a mirror is filled with water to adepth of 20.4 cm. A small fish floats motionless 6.60 cm under the surface of the water. What is the apparent depth of the fish when viewed at normalincidence to the water
an electron is initially at rest in a uniform electric field of intensity 1400 nc.find the followinga its acceleration
A skier weighing .80kN come down a frictionless ski run that is circular (R=30 m) at the bottom, what is her speed at the bottom of the hill
A small ball of 53 grams is suspended from a string of length 86 centimeters and whirled in a circle lying in the horizontal plane. If the string makes and angle of 31 degrees with the vertical, find out the centripetal force experienced by the ball...
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