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A 100W yellow lightulb(550nm) is 100m away from a 3cm diametershuttered aperture. What is the total irradiance?
An object of size 3cm is placed 14cm in front of a concave lens of focal length 21 cm. decsribe the image formed by the lens. What happens , if the object is moved further away from the lens
As a crude model for lightning, consider the ground to be oneplate of a parallel-plate capacitor and a cloud at an altitude of470 m to be the other plate. How much charge can the cloud hold
If the power output of a 630 kHz radio station is 50.0 kW, how many photons per second are produced
four identical 2kg point masses are fixed at the corners of a massless rectangle of length 20cm and width 15cm. determine the angular velocity of the masses
A piece of metal weighs 53.6 N in air, 35.0 N in water, and 42.2 N in an unknown metal. What is the density of the unknown liquid
A 238 g particle is released from rest at point A inside a smooth hemispherical bowl of radius 32.5 cm.compute the gravitational potential energy at A relative to B.
Two students with vibrating 440Hz tuning forks walk away from each other with equal speeds. How fast must they walk so that they each hear the frequency of 433 from the other fork.
A computer is reading data from a rotating CD-ROM. At a point that is 0.030m from the center of the disk, centripetal acceleration is 120m/s2. What is the centripetal acceleration at a point that is 0.05 m from the center of disc.
A cylindrical grain bin 24.0 ft in diameter is filled with corn whose weight density is 45.1 lb/ft^3. How tall can the bin be for the floor
An archer wishes to shoot an arrow at a target at eye level a distance of 43.5 m away. what angle should the arrow make with the horizontal
Suppose the skin temperature of a naked person is 35 C when the person is standing inside a room whose temperature is 22 C. The surface area of the individual is 1.5m2.
Two spheres having masses M and 2Mand radii R and 3R, respectively, How fast will each sphere bemoving when they collide
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