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A magnetic needle free to rotate in a vertical plane orients itself vertically at a certain place on the Earth. What are the values of (i) horizontal component of Earth's magnetic field and (ii) angle of dip at this place?
As viewed from above, a fireworks box with mass m = 6.0 kg slides with speed v = 3.0 m/s across a frictionless floor in the positive x direction. What is the speed of the second piece
A thin sheet of transparent material has an index of refraction of 1.80 and is 24.0 µm thick. how many fringe shifts occur in the pattern
An individual is nearsighted; his near point is 13.0 cm and his far point is 43.0 cm. What lens power is needed to correct his nearsightedness? When the lenses are in use, what is this person's near point?
A 0.8-kg block attached to an ideal spring with a spring constant of 92 N/m oscillates on a frictionless, horizontal surface. If the total mechanical energy is 0.64 J, the greatest speed of the block is
A prototype car on a test track has a velocity vx as a function of time given by vx(t) = At2 + Bt with constants A = 3.2 m/s3 and B = 1.7 m/s2. If the car starts at the origin, what is its position at t = 3.5 s
A 10-kg cylinder rolls without slipping on a rough surface. At an instant when its center of gravity has a speed of 10 m/s, determine (a) the translational kinetic energy of its center of gravity,
a rope under a tension of 280 n and fixed at both ends oscillates in a second-harmonic standing wave pattern. the
A sample of blood is placed in a centrifuge of radius 12.0 cm. At how many revolutions per second should the centrifuge be operated
The driver of a truck slams on thebrakes when he sees a tree blocking the road. With what speed does the truck then strike the tree
a worker pushes a 160kg cargo box on a horazontal frictonless surface with a constant force of magnitude. at 6s the box was moving at 1.8km/h. a second worker joins in at that time and supply's ab additional force of mag F2.
calculate the final pressure of a sample of water vapour that expands reversibly and adiabatically from 87.3 Torr and 500 cm^3 to a final volume of 3.0dm^3.Take gamma=1.3
A vertical-axis capstan drum 60 cm in diameter was used to pull inthe anchor chain of a whaler a century ago. Six horizontal arms 1.2m long protruded from the top of the drum, and a man on each armexerted a force of 300 N on it. The efficiency of ..
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