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A bridge of length 50.0 m and mass 8.10x 104 kg is supported on a smooth pier ateach end. A truck of mass 3.20 x104 kg is located 15.0 m from one end. What are the forces on the bridge at the points of support?
A simple model considers a continent as a block (density ? 2800 kg/m3), estimate the height of the continent above the surrounding mantle rock
A rock is thrown vertically upward with a speed of 15.0m/s from the roof of a building that is 70.0m above the ground. What is the speed of the rock just before it strikes the ground
An 82.0 kg-diver stands at the edge of a light 5.00-m diving board, which is supported by two pillars 1.60 m apart, Find the force exerted by pillar B on the board
A skier (m=63.0 kg) starts sliding down from the top of a ski jump with negligible friction and takes off horizontally. If h = 6.10 m and D = 12.2 m, find H.
Two resistors of wattage 100 W each is connected in series with a source. Find the total watage of load connected in circuit
A sample of ore containing radioactive strontium9038Sr has an activity of 7.6 x 105 Bq. How many grams of strontiumare in the sample
Your car's speedometer works in much the same way as its odometer, except that it converts the angular speed of the wheels to a linear speed of the car, How fast are you going when your wheels are turning at 520 rpm
a 2.55-kg model rocket is launched vertically upward with sufficient initial speed to reach a height of 2.83middot102 m
A 800 kg car is travelling forwards at + 25 m s?1 along a level road. What is the acceleration during skidding
Two small metal balls, carrying a charge +Q, are lying on an insulating surface a distance D apart. On either side of the two balls are small metal posts that are fixed to the surface. The distance between the posts and the balls is also D. The dimen..
If the first-order maximum for pure wavelength light falling on a double slit is at an angle of 10.0 degrees, at what angle is the second-order maximum, What is the angle of the first minimum
On the screen of a multiple-slit system, the interference pattern shows bright maxima separated by 0.86° and seven minima between each bright maximum. How many slits are there
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