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During very high speed, the atmospheric pressure inside a home may blow the roof off because of the reduced outside pressure. Determine the force on a square roof 15 meter on a side if the wind speed over the roof is 100 mph.
A 21 g bullet travelling at 255 m/s is fired into a 0.452 kg wooden block anchored to a 100 N/m spring. How far is spring compressed to the nearest thousandth of a meter.
The south pole of a bar magnet sits inside a rectangular, closed Gaussian surface, while the north pole sits outside. What is the magnetic flux through the closed surface
Find the lowest energy of the system (in electron volts) and list the quantum numbers of all occupied states. Find when the current in the solenoid increases to 5.0 A in a period of 0.90 s.
An industrial laser is used to burn a hole through a piece of metal. The average intensity of the light is = 1.72 × 109 W/m2. What is the rms value of (a) the electric field and (b) the magnetic field in the electromagnetic wave emitted by the laser.
An object has a charge of -4.3 ?C. How many electrons must be removed so that the charge becomes +2.8 C?
Consider an electron in a hydrogen atom, which is 0.050 nm from the proton in nucleus. What electric field does the electron experience?
Imagine that you swing about your head a ball attached to theend of a string. The ball moves at a constant speed in a horizontal circle. What centripetal force are you imparting to the ball via the string
In a head-on collision, a car stops in 0.30{\rm s} from a speed of 30{\rm m}/{\rm s}. What force is applied to the driver by his seat belt during that fraction of a second
An indestructible bullet, 2cm long, is fired straight through a board which is 10 cm thick. What is the total time the bullet is in contact with the board
A 5 kg block has an initial speed of 10m/s down a frictionless include plane. Determine the amount by which the spring compress
Alpha Centauri is 4.3 light years away. If we could make a rocket that went 4/5 the speed of light: What would the travel time be for the astronauts
What is the magnitude of the electric field at the centre ofa square of side 45.00 cm if one corner is occupied by a chargeQ1 = 20.00 uC and the other three corners areoccupied by three charges each of charge Q2=-20.00 uC.
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