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A spherical weather balloon is filled with hydrogen until its radius is 3.00 m. Its total mass including the instruments it carries is 15.0 kg.
(a) Find the buoyant force acting on the balloon, assuming the density of air is 1.29 kg/m3. N
(b) What is the net force acting on the balloon and its instruments after the balloon is released from the ground? N
(c) Why does the radius of the balloon tend to increase as it rises t
A small glass bead has been charged to + 30{rm nC} . a)What is the magnitude of the acceleration of a proton that is 3.0{rm cm} from the center of the bead? b)What is the magnitude of the acceleration of an electron that is 3.0{rm cm} from the cen..
Suppose you wish to make a solenoid whose self-inductance is 1.5 mH, The inductor is to have a cross-sectional area of 1.7 x 10-3 m2 and a length of 0.046 m
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A sinusoidal wave is traveling along a rope. The oscillator that generates the wave completes 38.0 vibrations in 26.0 s, What is the wavelength of the wave
Find the Band Structure and Band Occupancy
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Unpolarized light is shone on a stack of 3 polarizers, What fraction of the initial intensity emerges from the stack
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A 30 g ball of clay is thrown horizontally at 20 m/s toward a 1.7 kg block sitting at rest on a frictionless hi surface. The clayts and sticks to the block. What is the speed of the block and clay right after the collision?
The height of a door is measured by four people and their measured values are 217.0 cm, 217.9 cm, 217.3 cm, and 217.6 cm, What is the standard deviation for the four measurements
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