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A laser is mounted on a table 1.10m above the ground, pointed at a vertical mirror a horizontal distance 3.60m away. The laser beam strikes the mirror 1.54m above the ground. Behind the laser is a wall, 2.82m from the aperture where the laser light emerges. At what height does the reflected beam strike the wall?
An 84.6-kg climber is scaling the vertical wall of a mountain. His safety rope is made of nylon that, How much is the rope stretched when it breaks his fall and momentarily brings him to rest
A typical coal-fired power plant has a generating capacity of about 1.3 X 10^9 W of electric power. What is the overall thermal efficiency of the plant
A bullet with a mass of 4.95 g and a speed of 940 m/s penetrates a tree horizontally to a depth of 6.15 cm. Calculate the magnitude of this frictional force
A 42 ohm, 2.8 mA galvanometer is to be converted to a voltmeter that reads 178 V at full scale defection. What value of series resistance should be used with the galvanometer coil
A thin insulating stick 3.00 m long has a uniform charge density with a total charge of 7 micro Coulombs. The stick has one end at the origin and extends along the positive x-axis. What is the electric field vector at a point (3.00 m, 3.00 m) in a Ca..
A block of mass m is suspended from the string a height h above the ground. The string is wrapped around a disk shaped pulley with mass m and radius R. Find out the tension T in the string. (The answer should be in terms of variables). Rotational ..
Resolve the position s_b of the image if an object is placed in air on the axis of the rod 16.00 cm to the left of the end of the rod.
The energy provided each hour by heat to the turbine in an electric power plant is 9.5 x 10^12 J. If 6.5 x 10^12 J of energy is exhausted each hour from the engine as heat
Your airplane is caught in a brief, violent downdraft. To your amazement, the pretzels on your seatback tray rise vertically, What's the downward acceleration of the plane
At an accident scene on a level road, investigators measure a car's skid mark to be 68-m long. It was a rainy day and the coefficient of friction was estimated to be 0.38. Make use of these data to determine out the speed of the car when the drive..
A 0.62 kg glider slides frictionlessly on an 3-m air track inclined at an angle of 12 degrees. What will the scale read as the system accelerates
A certain lightbulb filament when hot has a resistance of205 %u03A9. What current is flowing through the bulb at that time
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