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The size of the virtual image formed by a lens is 2 times the size of the object. The distance between the object and the virtual image is 20 cm. Find the focal length of the lens.
You are in a hot-air balloon that, relative to the ground, has a velocity of 4.65 m/s in a direction due east. find direction of the hawk's velocity relative to the ground
An electron of ? = 0.999 993 moves along the axis of an evacuated tube that has a length of 2.69 m as measured by a laboratory observer S at rest relative to the tube
A microphone is moving in air towards a stationary source of sound. The detected frequency is 106 Hz greater than the emitted frequency. What is the speed of sound in the unkown liquid
A humanitarian aid package is dropped from a plane flying horizontally 500m above the ground with a speed 100m/s. What is the speed of the package at time of impact? (Calculate the total speed, not a horizontal or vertical projection.)
A sample contains 3.5Ã-1019 radioactive atoms with a half life of 10000 years. How many atoms are expected to decay in the first second
In a TV picture, faint, slightly offset ghost images are formed when the signal from the transmitter travels to the receiver both directly, what is the difference in the distance traveled by the two signals
Triply charged uranium-235 and uranium-238 ions are being separated in a mass spectrometer. What is the separation between their paths in meters when they hit a target after traversing a semicircle
2.00 mole of an ideal gas at 330k, 3.50 atm and 3.0L are isothermically compressed causing a change of entropy in the system equal to -25.0 J*K^-1. determine the final volume of the system
The super ball is not replaced by a clay ball the same size and mass. The ball is dropped from the same height and it sticks to the table. Calcluate the impulse exerted on the clay ball
An electron and a proton are each placed at rest in a uniform electric field of magnitude 546 N/C. Compute the speed of each particle 52 ns after being free.
A wheel has a radius of 0.5 m. If the wheel rotates on its axis through an angel of 46 degrees, what distance does a point on the rim of the wheel move
Compute the Brewster’s angle and angle of refraction.
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