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The figure below shows a closed Gaussian surface in the shape of a cube of edge length 2.30 m. It lies in a region where the electric field is given by = [ (3.20x + 4.00) + 6.00 + 7.00 ] N/C, where x is in meters. What is the net charge contained by the cube?
You are walking along a small country road one foggy morning and come to an intersection. While you are crossing, you hear an ambulance siren, At what speed is the ambulance traveling
One of the harmonics of a column of air open at one end and closed at the other has a frequency of 448 Hz, What is the fundamental frequency of the air column
A car of mass 1800 travelling at 60.7 enters a banked turn covered with ice. The road is banked at an angle, and there is no friction between the road and the car's tires. Use = 9.80 throughout the problem.
A river narrows at a rapids from a width of 15m to a width of only 6.0m. The depth of the river before the rapids is 2.7m ; the depth in the rapids is 0.70m. Find the speed of water flowing in the rapids
A 25 g of copper pellets are removed from a 300 C oven and immediately dropped into 120 mL of water at 18 C in an insulated cup. What will the new water temperature be.
A 40-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, kinetic energy decreases to 240J from 470J. How high does she rise during this interval? Avoid air resistance.
A satellite that weighs 4900 N on the launchpad travels around the earth's equator in a circular orbit with a period of 1.667 h. Calculate the magnitude of the earth's gravitational force on the satellite
the distance between the slits in the two-slit experiment is 1.50 x 10^ -5 m. What is the distance on the screen between the central bright fringe and the 4th order bright fringe
A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 54.56 diopters, How far is the blackboard from her eyes
A flask containing 800 g. of water is heated. If the temperature of the water increases from 27 degrees Celsius to 88 degrees Celsius, how much heat (in joules) did the water absorb.
A laser beam passes through a single slit. We observe an interference pattern on a screen 9.03 m away. Find the width of the slit
An airplane with a speed of 93.3 m/s is climbing upward at an angle of 58.5 ° with respect to the horizontal. Relative to the ground, determine the angle of the velocity vector of the package just before impact
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