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Q. Two narrow slits 62um apart are illuminated with light of wavelength 480nm . What is the angle of the bright fringe in degrees?
Q. A 210-kg crate is pushed horizontally with a force of 685 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate.
A loudspeaker of mass 20.00 {rm kg} is suspended the distance of h = 2.40 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.50 {rm m}.
Find the boundary layer thickness and drag on a given plate if Water at 15°C flows over a plate 2m long and 25cm wide at a velocity of 5 m/s along its length.
At what angle is the curve banked? The acceleration due to gravity is 9.8 m/s2.
Meanwhile, Isaac is piloting his ship in the westward direction, also at 0.89, toward Albert's ship. With what speed does Isaac see Albert's light beam pass his ship.
A 7 kg bowling ball moves at 2.15 m/s. How fast should a 2.40 g Ping-Pong ball move so that the two balls have the same kinetic energy.
A lighthouse that rises h1 = 43.6 ft above the surface of the water sits on a rocky cliff that extends $d$ = 20.0 ft from its base, as shown in the figure below. A sailor on the deck of a ship sights the top of lighthouse at an angle of $theta$ = 29...
Two vectors A and B have the similar magnitude of 100 N (they represent forces of equal strength). What is the magnitude of the resultant vector of A and B if they are parallel and pointing in opposite directions.
A radio controlled car increases its kinetic energy from 4J to 12J over the distance of 2 m. What was the average net force on the car during this interval.
An archer pulls her bow string back 0.40m by exerting a force that increases uniformly from zero to 25 N. How much work does the archer do in pulling back the bow.
A 7 g bullet collides horizonally with a 43 g block resting on a frictionless horizontal surface as shown in the accompany diagram. The bullet remain embedded in the block and subsequently causes the block to slide down a frictionless slope onto a..
Use the simulation in the cannon interactive in this section to answer the following questions. (a) Does cannonball's horizontal velocity change as it moves through the air? (b) Does its vertical velocity change? (c) If you enhance the cannonball's h..
On a very muddy football field, a 100 linebacker tackles a 75 halfback. Immediately before the collision, the linebacker is slipping with a velocity of 8.9 north's and the halfback is sliding with a velocity of 7.9 east's.
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