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A seagull flies at a speed of 10m/s directly into the wind. Knowing that it takes the bird 25 min to travel 8km relative to the earth, find the velocity of the wind. How long will it take the seagull to travel a distance of 12km with the wind?
A thin rod with length L has a linear density that varies as D = dm/dx = Ax, Calculate the total mass of the rod in terms of A and L
Two cicadas, Chirpy and Milada, jump from the top of a vertical cliff. Chirpy just drops and reaches the ground in 3.10 , while Milada jumps horizontally with an initial speed of 98.
A mass-spring system oscillates with period of 0.23 sec. The spring's spring constant k = 450 N/m. What mass is attached to the spring
3 30 pound kegs are stacked on a dolley (2 on top of each other and the third on top of both of them opposite of the dolley back (they form kind of a triangle)). Calculate the force the dolley wheel exerts ON the floor
Two vehicles approach an intercetion at right angles and collide. If vehicle #2 has a mass of 600kg, vehicle #1 has a mass of 300kg, and they are both travelling at 13 m/s before the collision, what is the magnitude and direction of the final velo..
A monochromatic beam of light is absorbed by a collection of ground-state hydrogen atoms in such a way that three different wavelengths are observed, What is the wavelength of the incident beam
Two charges are brought together until they are 90.0cm apart, causing the electric force between them to increase by a factor of exactly 6. What was their initial separation distance
Carol and Robin share a house. To get to work Carol walks north 2.5{\rm km} , while Robin drives west 8.0{\rm km} . how far apart are there two workplaces
A horizontal pipe contains water at a pressure of 150 {rm kPa} flowing with a speed of 1.30 {rm m/s}. The pipe narrows to one-half its original diameter. What is the speed of the water.
The side-view mirror of an automobile has a radius of curvature of 15.0 cm. How far is the object from the mirror
Two identical pith balls are hung by insulating strings, touching each other, as in the picture below. The mass of each ball is 0.002kg. Determine the charge on each ball
A photon of wavelength 0.45000nm strikes a free electron that is initially at rest, What is the speed of the recoil electron after the collision
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