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A block of mass m slides without friction down a looped track. If the block is to remain on the track even at the top of the circle, whose radius is r, determine from what minimum height must it be released?
Consider the scond hand on a clock which is smoothly rotating. Does it have linear velocity at the tip? Does it have tangential acceleration? If you spin a bucket full of water in a circle, why doesnt the water just fall out?
A bungee cord is stretched between two poles with a force of 393 N. What is the velocity of a wave on this bungee cord
A 54.6 g sample of a conducting material is all that is available. The resistivity of the material is measured to be 1.18×10-7 ?m and the density is 7.82 g/cm3. What length is required
Suppose that a particle accelerator is used to move two beams of particles in opposite directions. In a particular region, electrons move to the right at 9350 m/s and protons move to the left at 1681 m/s. The particles are evenly spaced with 0.085..
A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 550 kg. Before a trip, the flywheel is attached to an electric motor, Find the kinetic energy stored in the flywheel
When point charges q1 = +1.7 ?C and q2 = +8.7 ?C are brought near each other, each experiences a repulsive force of magnitude 0.30 N
What Current densities would produce the vector potentials A = ks^n in the phi direction (where k is constant and n is integer) in cylindrical coordinates? Are there any n values which cannot be connected to a current density?
a block of mass m=2.00kg is attached to the end of an ideal spring and its initially hanging motionless. with what angular frequency will the block oscillate
What is the acceleration of a rising hot-air balloon if the ratio of the air density outside the balloon to that inside is 1.39? Neglect the mass of the balloon fabric and the basket.
At what rate does the Sun radiate energy, given that it is essentially a spherical blackbody with 6.96x10^8m, Use appropriate astronomical data to find the solar radiation per unit area at Earth's orbit
A certain string can withstand a maximum tension of 31 N without breaking. A child ties a 0.33 kg stone to one end and, holding the other end, What is the speed of the stone as the string breaks
A satellite in Earth's orbit is accelerating towards the Earth. Explain why, on average, the satellite is not getting closer to the Earth.
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