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Question1
Drop solid sphere of aluminium into a bucket of water sitting on ground. The buoyant force equals weight of water displaced that is less than the weight of the sphere, so it sinks to the bottom. If you take a bucket with you on an elevator that accelerates upward, the apparent weight of the water increases and buoyant force on the sphere increases, too. Can acceleration of the elevator be great enough to make a sphere pop up out of the bucket of water? Give details!
Question2
The vitreous humor, a transparent, gelatinous fluid that fills most of the eyeball, has an index of refraction of 1.34. Visible light ranges in wavelength from 380 nm (violet) to 750 nm (red), as measured in air. This light travels throughout teh vitreous humor and stikes the rods and comnes at the surface of the retina. What are ranges of (a) wavelength, (b) frequency, and (c) speed of light just as it approaches the retina within the vitreous humor?
What is the instantaneous power, at a time of 0.00700 seconds, dissipated by a 200 ohm resistor in a resonant AC circuit powered by a generator with a 21.0 V greatest potential difference operating at 5000 rad/s .
If the lumberjack now trots toward the other end of the log with a speed of 2.7 m/s relative to the log, illustrate what is the lumberjack’s speed relative to the shore?
A bowling ball weighing 71.2 is attached to the ceiling by a 3.50 rope. The ball is pulled to one side and released; it then swings back and forth like a pendulum. As the rope swings through its lowest point, speed of the bowling ball is measured a..
Neutron stars are so named because they are composed of neutrons and have a density the same as that of a nucleus. find the radius of a neutron star
A 5 kg box block is pushed 3 m up a vertical wall with constant speed by a constant force of magnitude F at an angle of 60 degrees with the horizontal.
A 55g ball of clay traveling at speed v 0 hits and sticks to a 1.3kg kg block sitting at rest on a frictionless surface, What percentage of the ball's initial energy is "lost"
A 0.46 kg piece of wood floats in water but is found to sink in alcohol (specific gravity = 0.79) in which it has an apparent mass of 0.037 kg
A certain helium-neon laser pointer, emitting light with a wavelength of 632 nm, How many photons are emitted by the laser pointer
What is the magnitude of apparent weight of a 83-kg astronaut 3200km from the center of the Earth's Moon in a space vehicle accelerating toward the Moon at 3.8 m/s^2.
Find the resulting angular speed of the disk (in rad/s) and describe the direction of rotation.
Calculate the speed of a proton after it accelerates from rest through a potential difference of 170V, Calculate the speed of an electron
The magnetic field of the earth at a certain location is directed vertically downward and has a magnitude of 50.0 µT. FIND magnitude of the magnetic force the field exerts on the proton
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