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The potential difference between the surface of a 2.5cm -diameter power line and a point 1.6m distant is 4.1kV. What is the line charge density on the power line?
What is the speed of the projectile
A film of MgF2 (n = 1.38) having thickness 1.68 10-5 cm is used to coat a camera lens, What are the three longest wavelengths that are intensified in the reflected light
A heavy piece of hanging sculpture is suspended by a 90 cm-long, 5.0g steel wire. What is the mass of the sculpture
q1. a roller-coaster track has six semicircular dips with different radii of curvature. the similar roller-coaster cart
Three equal point charges, each with charge 1.10 , are placed at the vertices of an equilateral triangle whose sides are of length 0.200. Calcualte the electric potential energy of the system?
How many 112 W lightbulbs can you use in a 100 V circuit without tripping a 15 A circuit breaker? (The bulbs are connected in parallel, that means that the potential difference across each lightbulb is 100 V.)
A steel beam is placed vertically in the basement of a building to keep the floor above from sagging. Find the vertical compression of the beam
An excited H atom the e- is in 4d. The atom is in an external magnetic field. What are the smallest and largest possible angles
A 80 g, 33-{rm cm}-long rod hangs vertically on a frictionless, horizontal axle passing by its center. A 11 g ball of clay traveling horizontally at 2.5 m/s hits and sticks to the very bottom tip of the rod.
After a tornado, a 0.55-g straw was found embedded 2.8 cm into the trunk of a tree. If the average force exerted on the straw by the tree was 70 N, what was speed of the straw when it hit the tree .
A high-speed drill reaches 2300rpm in 0.51s. What is the drill's angular acceleration
A heat pump moves heat from outside, where the temp is 1 degree C, to inside a building, where the temp is 20 degrees C, How much heat is dumped into the building in each cycle
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