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The beam emerging from a ruby laser (wavelength 694.3 nm) passes through a circular aperture 6.2 mm in diameter.
(a) If the spread of the beam is limited only by diffraction, what is the angular spread of the beam?(b) If the beam is aimed at the Moon, how large a spot would be illuminated on the Moon's surface?
While rearranging a dorm room, a student does 276 J of work in moving a desk 1.7 m. What was the magnitude of applied horizontal force.
A firecracker in a coconut blows the coconut into three pieces. Two pieces of equal mass fly off south and west, What is the speed of the third piece
A vertical tube open at the top contains 5.2 cm of oil (density 0.82 g/cm^3) floating on 5.2 cm of water. Find out the gauge pressure at the bottom of the tube.
How many 185 W lightbulbs can you use in a 191 V circuit without tripping a 15 A circuit breaker? (The bulbs are connected in parallel, which means that the potential difference across each lightbulb is 131 V.)
An electron is orbiting a proton under the Coulomb force in a hydrogen atom at a radius of 0.52 × 10-10 m
. Once the crate has started to move, expalin how large must F be in order to keep the crate moving at a constant speed?
Two point charges are fixed on the y axis: a negative point charge q1 = -26 µC at y1 = +0.20 m and a positive point charge q2 at y2 = +0.38 m, Determine the magnitude of q2
A thin soap film (n = 1.302) suspended in air has a uniform thickness. When white light strikes the film at normal incidence, violet light (&lambdav = 412 nm) is constructively reflected. At what angle of incidence will green light (&lambdag = 562..
A 50 g Super Ball travelling at 28 m/s bounces off a brick wall and rebounds at 18 m/s. A high-speed camera records this event. If the ball is in contact with wall for 5 ms, what is the magnitude of the average acceleration of the ball throughout ..
The index of refraction for red light in water is 1.331, what are the underwater angles of refraction for the blue and red components of the light
A car is driving 22.7m/s flat ground drives off 42.3 m high cliff. How much time does it take to reach the ground.
Vector A has a magnitude of 116 units and points 37.0 ° north of west. Vector B points 69.0 ° east of north. Vector C points 17.0 ° west of south. These three vectors add to give a resultant vector that is zero. Using components, find the magnitud..
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