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Light is emited from an ordinary lightbulb filament in wave-train bursts about 10^-8s in duration. What is the length in space of such wave trains?
Three forces in the x-y plane act on a 5.5 kg mass: 10.3 N directed at 37°, 12.2 N directed at 128 °, and 4.1 N directed at 201° . Calculate the direction of the resultant force
Three point charges are placed at the corners of an isosceles triangle. At the left and right end points of the base are 6 micro coulomb and 6 micro coulombrespectively, What is the magnitude of the electric field at the midpoint of the baseline
A block of mass 1.90 kg is pushed 4.60 m along a frictionless horizontal table by a constant 16.0 N force directed 27.0° below the horizontal.
The distance from the human eye lens system and the retina is typically 19.0 mm. What is the focal length of the eye lens system for a relaxed eye
Sodium light (589.3 nm) from a narrow slit illuminates a Fresnel bi-prism made of glass of refraction index 1.5. What is the biprism angle
Determine the average speed for the trip
a 200 g ball of putty falls vertically into a 2.50 kg cart that is rolling freely at 2.00 ms on a horizontal surface.
Two children are playing on a balanced seesaw. One child with a mass of 40 kg sits 1.6 m from the center. Where on the other side must the second child sit
A 249.0 kg block of ice at 0*C is placed in a large lake. The temperature of the lake is just slightly higher than 0*C, and the ice melts. What is the entropy change of the ice
A telescope has an angular magnification of -30× and a barrel 1.02m long. What is the focal length of the eyepiece
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. What is the orbital period of the faster planet, in years
A railroad car of mass 2.3 104 kg moving at 5.00 m/s collides and couples with two coupled railroad cars, What is the speed of the three coupled cars after the collision
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