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A uniform 1.9-kg rod that is 0.90 m long is suspended at rest from the ceiling by two springs, one at each end. Both springs hang straight down from the ceiling. The springs have identical lengths when they are unstretched. Their spring constants are 62 N/m and 32 N/m. Find the angle that the rod makes with the horizontal.
Birds resting on high-voltage power lines are a common sight. The copper wire on which a bird stands is 2.5 cm in diameter and carries a current of 55 A. If the bird's feet are 3.9 cm apart, calculate the potential difference between its feet. (Th..
A subway train starts from rest at a station and accelerates at a rate of 1.50m/s2 for 14.2s . It runs at constant speed for 69.6s and slows down at a rate of 3.51m/s2 until it stops at the next station. find total distance covered? express answer..
When doing a sound experiment, you recorded the sound of a single frequency sound when it was stationary. What frequency did you hear as your friend rode away from you
At what rate does the Sun radiate energy, given that it is essentially a spherical blackbody with 6.96x10^8m, Use appropriate astronomical data to find the solar radiation per unit area at Earth's orbit
Four ideal linear sheet polarizers are stacked one behind the other with the transmission axes of the first vertical, the second at 30°, the third at 60°, What fraction of the incident unpolarized light emerges
A narrow beam of sodium yellow light with wavelength 589 nm in vacuum, Determine the wavelength of the light in water
Two people pull as hard as they can on horizontal ropes attached to a boat that has a mass of 200 kg. If they pull in the same direction, the boat has an acceleration of 1.59 m/s2 to the right. If they pull in opposite directions, the boat has..
The intensity (in W/m2) of one sound is 7.12 times as great as the intensity of another sound. Relative to the quieter sound
The focal length of a bi-convex lens is 10 cm. The focal length of a convex-concave thin lens is -20 cm. If placing them in parallel and in close contact, what is the compound focal length
A car is traveling down a hill that makes an angle of 13° with the horizontal. The driver applies her brakes, evaluate the acceleration of the car
How long must a 0.60 mm diameter silver wire be to have a 0.56 A current when connected to the terminals of a 1.5 V flashlight battery
If the same number of 9.00 ?F capacitors are connected in series with the same 4.00 V battery, how much charge will end up on each capacitor plate
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