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Q. Light-rail passenger trains that give transportation within and between cities are capable of modest accelerations. The magnitude of the maximum acceleration is typically 1.3 {rm m}/{rm s}^{2}, however the driver will usually maintain a constant acceleration that is less than the maximum. A train travels throughout a congested part of town at 5.0 m/s. Once free of this area, it speeds up to 13 m/s in 8 {rm s}. At the edge of town, driver again accelerates, with the same acceleration, for another 16 {rm s} to reach a higher cruising speed.
2.0 kg ball moving with a speed of 3.0 m/s hits, elastically, an identical stationary ball as shown. If the first ball moves away with angle 30° to the original path,
Estimate the thickness of lead shielding needed to reduce the exposure rate 2.5 m from a 5.92x10^11 Bq point source of Cs-137 to 1.0 mR/hr.
A 1200kg car rounds a curve of radius 65 m banked at an angle of 14degrees. if the car is traveling at 30km/hr, will a friction force be required? if so, how much and in what direction.
Two free particles (that is, free to move) with charges +q and +4q are a distance L apart. A third charge is placed so that the entire system is in ?quilibrium. Find out the location, magnitude, and sign of the third charge.
Different values of the energy
Consider a too-small space station that consists of a 2.7m radius rotating sphere. A man standing inside is 1.9m tall and his feet are at 1g. What is the acceleration of his head.
A car travelling at 95 km/h strikes a tree. The front end of the car compresses and the driver comes to rest after travelling 0.87m. What was the average acceleration of driver during the collision? State the answer in terms of "g's," where 1g = 9..
Pandora Jewellery has turn into the best choice for ladies all more than the world who desires to express their personal style. The Pandora Bracelets provide a rich array of stylish diamond jewellery developed by artisans utilizing the finest mate..
A bowling ball weighing 71.2 is attached to the ceiling by a 3.50 rope. The ball is pulled to one side and released; it then swings back and forth like a pendulum. As the rope swings through its lowest point, speed of the bowling ball is measured a..
A potential difference of 87mV exists between the inner and outer surfaces of the cell membrane. The inner surface is negative relative to outer surface. How much work is required to eject a positive sodium ion (Na+) from the interior of the cell.
A person pulls on a 50kg desk with a 200 N force acting at a 30 degree angle above the horizontal. The desk does not budge.
A 2000kg vehicle is travelling down the road at 20m/s (45 mph) when it reaches an intersection. Between rubber and dry asphalt, the coefficient of friction is 0.80. What is the minimum distance necessary for the car to stop.
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