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A pilot flies out of Cleveland and sets the compass of the plane due north. The pilot maintains an airspeed of 250km/h. After flying for 30 minutes the pilot finds that the plane is 200km north and 40 km west of the starting point. What is the velocity of the wind?
a mass at the origin is pulled by four perpendicular ropes, with a force of 10N in the direction of the positive y axis, 8N to the positive x axis, What is the angle at which the force is acting
A 23.0 kg child plays on a swing having support ropes that are 2.10 m long. How fast will she be moving at the bottom of the swing
An artificial lens is implanted in a person's eye to replace a diseased lens. The distance between the artificial lens and the retina is 2.78 cm. What is the power of the implanted lens
A small spinning asteroid is in a circular orbit around a star, much like the earth's motion around our sun. calculate the equilibrium temperature of the asteroid
Two neutrons are in an infinite square well with L=2.0 fm. Find the minimum total energy that the system can have
A 0.450-kg ball is dropped from rest at a point 1.30-m above floor. The ball rebounds straight upward to a height of 0.700-m. What are the magnitude and direction of the impulse of the net force applied to the ball throughout the collision with th..
It takes sound waves of frequency 500 Hz 14.7 ms to make a round trip through a hollow pipe of length 7.5 m filled with helium. What is the speed of sound in helium
Four equal masses M are spaced at equal intervals, l, along ahorizontal straight rod whose mass can be ignored. find the momentof inirtia of the system about this axis
The acceleration of gravity is 10 m/s2. What is the acceleration of a 39 kg pail of cement that is pulled upward (not sideways) with a force of 421 N? Answer in units of m/s2.
Light shines through a single slit whose width is 5.8 x 10-4 m. A diffraction pattern is formed on a flat screen located 4.0 m away. The distance between the middle of the central bright fringe and the first dark fringe is 4.3 mm. What is the wavelen..
A projectile is fired at v0 = 433.0 m/s at an angle of 69.0o with respect to the horizontal. Assume that air friction will shorten the range by 35.1%. How far will the projectile travel in the horizontal direction
If a low-pressure sodium vapor lamp emits 50 W of yellow light, how many photons does it emit each second
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