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Light in air is incident perpendicularly on a sheet of crown glass having an index of refraction of 1.522. Determine both the reflectance and transmittance
An elephant's legs have a reasonably uniform cross section from top to bottom, and they are quite long, pivoting high on the animal's body. how many steps per minute will the elephant take
An 8.0 kg block is released from rest, v1 = 0 m/s, on a rough incline, which has an angle of 40 from the horizontal. How much work gravity do on the block during this process
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1230 Hz, What is the speed of the bird
Four rays of light are incident on a surface of water. Their angles of incidence are 20, 30, 45, y 60 degrees. Calculate the angle of refraction for each ray
Two poles, one of which is 5 times as strong as the other, exert on each other a force equal to 0.8x10^-3 kgf, Find the strength of each pole
You wish to replace the flooring in your kitchen with square linoleum tiles that measure 12 inches on a side. how many such tiles will you need to buy
A soccer player kicks a ball toward a wall 15.0 m away, with velocity 25.0 m/s at 30.0 above the horizontal. Determine how high up the opposite wall the ball hits, and nd the impact velocity
At NASA's Zero Gravity Research Facility in Cleveland, Ohio, experimental payloads fall freely from rest in an evacuated vertical shaft through a distance of 132 m. How fast will the payload be traveling when it reaches the bottom of the shaft
The leg and cast weigh 177N (w1). Find out the weight w2 and the angle α required so that no force is exerted on the hip joint by the leg plus cast.
charge q1=1 ?C is located at the position (x,y,)=(5 cm, 7 cm). A second charge, q2=2 ?C is located at the position (x,y,)=(5 cm, 0 cm). Calculate the work required to move a third charge
What is the average value of the orbital angular momentum, L, for the hydrogen atom if the electron is in the 3d orbital? Note that the average value of L can be written as = ^(1/2).
at the instant the traffic light turns green a car that has been waiting at an intersection starts ahead with a
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