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A pilot wants to fly 800 km due north. He can fly 500 km/hr in still air. He finds he has to head his plane 20° E of N to reach his destination and the trip takes him two hours. What is the wind speed and direction?
three point charges are on the x axis q1 6 micro coulomb at x 0 q2 4 micro coulomb at x 2 m and q3 -1.5 micro
Light enters a container of liquid at an angle of 42 degree to the normal; Evaluate the index of refraction of this liquid
A man stands on the roof of a 13.0 {\rm m}-tall building and throws a rock with a velocity of magnitude 30.0 {\rm m}/{\rm s} at an angle of 30.0^\circ above the horizontal. Calculate the magnitude of the velocity of the rock just before it strikes ..
An object of mass 555 grams sitting on a plane inclined at 35 degrees doesn't slide. Now the plane is lifted to the angle of 50 degrees and the object slides down plane knowing that the coefficient of kinetic friction is 0.44, find out the coefficien..
You have a ball on a wire that is twirled in a circular orbit with a radius of 3.3 m, What is the speed of the ball in orbit
A glass plate (n=1.62) is coated with a thin, transparent film (n=1.27). Light reflected at normal incidence is observed as the wavelength is varied continuously. Find the thickness of the film
If a bearing needs 4.50s to solidify enough for impact, how high must the tower be? What is the bearing's impact speed?
What is the angular momentum of the moon about the Earth, The mass of the moon is 7.35 x 10^22 kg, the center-to-center separation of the Earth
A 3.27-m3 tank contains 100 kg of nitrogen at 175 K. Determine the pressure in the tank, using
A bowling ball encounters a 0.760 m vertical rise on the way back to the ball rack. Ignore frictional losses and assume the mass of the ball is distributed uniformly. the translational speed pf the ball is 3.5 m/s at the bottom of the rise. find the ..
Water flows out of a garden hose nozzle at 1.2 m/s. The nozzle has a diameter of 2cm. How long will it take to fill a paddling pond which is cylindrical with diameter 2m and depth 20cm?
When both cars increase their speed by 7.0m/s , they then have the same kinetic energy. What were the original speeds of the two cars
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