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An object is attached to the lower end of a 100-coil spring that is hanging from the ceiling. The spring stretches by 0.160 m. The spring is then cut into two identical springs of 50 coils each. Each spring is attached between the ceiling and the object. By how much does each spring stretch?
A bicyclist is coasting down a hill with a slope of 8 deg into a head wind of 5 m/sec (measured relative to the ground). The bicycle + rider mass is 80 kg and the coefficient of rolling friction is 0.02. Assuming that the frontal area is about 0.5 m2..
A force F is applied horizontally to a block of mass 2 kg which, nevertheless, slides down a frictionless 5-m plane inclined at 25 degrees to the horizontal. what is its acceleration down the plane
What is the direction of the force that the unknown charge exerts on the charge of magnitude 0.580uC?
A 1484-kg car is moving westward with a speed of 20.7 m/s, Find the velocity of the center of mass of the car-truck system
A student draws the ray diagram shown in the figure but forgets to label the object, the image, which arrow represents the object, and which represents the image
At t=0, the water is turned off and the surface of the pipe is maintained at 40° from then on (neglect the wall thickness of the pipe). Find the temperature distribution in the water as a function of r and t.
The suspension cables on the Brooklyn Bridge are 15.75 in. diameter wire ropes. Estimate the total drag force on one of the cables in a 40 mph wind if the length of one cable is about 3000 ft and the air temperature is 70o F.
A snowboarder starts from rest rides 30.31m down a snow covered slope that makes an angle of 34.19 degrees with the horizontal, How far will she travel along the flat snow
Brillouin zones of rectangular lattice. Make a plot of the first two Brillouin zones of a primitive rectangular two-dimensional lattice with axes a, b = 3a.
A small mass m is set on the surface of a sphere, Fig. 4-51. If the coefficient of static friction is µs = 0.57, at what angle would the mass start sliding
As the fragment falls through the atmosphere, it is heated and some of the material is vaporized. Explain how you could determine the composition of this hot vaporized material from the light it emits.
A stone is thrown upward with an initial speed of 20 m/s. What is its acceleration at the highest point of its trajectory?
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