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A glass is half-full of water, by a layer of vegetable oil (n = 1.47) floating on top. A ray of light travelling downward during the oil is incident on the water at an angle of58.0°. Decide the critical angle for the oil-water interface
A woman of mass m = 50.9 kg sits on the left end of a seesaw-a plank of length L = 3.99 m, Find the normal force exerted by the pivot if the plank has a mass of mpl = 13.4 kg
An airplane, whose air speed is 380 km/hr, is supposed to fly in a straight line 23.0 degrees north of due east. A steady 100 km/hr is blowing from the north. Illustrate in what direction should the plane head realative to the earth?
The ball thrower, who has a mass of 100 kg, can throw a 500 g ball with a speed of 10 m/s. What constant force must the athlete exert on the ball
Consider neon, a noble gas whose molecules consist of single atoms of atomic mass 0.02 kg/mol. What is the root-mean-square speed of a neon atom under such conditions
A sailboat tracking against the wind moves as follows: 3.2 km at 45 degrees east of north, 4.5 km at 50 degrees west of north, What is the speed if it is assumed to be constant
Suppose that the speed of the water in the reservoir is zero, and that the water flow is steady. Overlook both air resistance and the height difference between the reservoir and the muzzle.
An electron has a momentum that is two times larger than its classical momentum. Find the speed of the electron
Light of wavelength 800nm is incident on a metallic surface. if the stopping potential for the photo-electrons ejected from the metal is 0.35 volts, find the work function for the metal and the longest wavelength incident light that will eject photo-..
a 315 kg box moving at 35 ms and strikes a 155 kg box which is at rest. if the 155 kg box travels 14 m before coming to
You kick a rock off a cliff which is 22.22 m high, with a horizontal velocity of 13.90 m/s, What is the magnitude of the rock's total velocity when it hits the ground below
In vacuum, two charged particles lie 2.5 cm apart. Find the magnitude and direction of the electric field at a point midway between the two particles. (One has a charge of -8.0 µC and the other has a charge of +4.0 µC.) Magnitude.
on a spacecraft two engines fire for a time of 565 s. one gives the craft an acceleration in the x direction of ax
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