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A single bead can slide with negligible friction on a wire that is bent into a circular loop of radius 15.0 cm, as in Figure P6.68. The circle is always in a vertical plane and rotates steadily about its vertical diameter with (a) a period of 0.450 s. The position of the bead is described by the angle θ that the radial line, from the center of the loop to the bead, makes with the vertical. At what angle up from the bottom of the circle can the bead stay motionless relative to the turning circle? (b) What If? Repeat the problem if the period of the circle's rotation is 0.850 s.
In one measurement of the body's bioelectric impedance, values of Z = 5.62 x 102 and = -9.14° are obtained for the total impedance, Determine the bodys capacitive reactance
A thief was trying to pull a 20 kg coffer (a coffer is a box usually used to hold valuables) along an essentially frictionless horizontal surface. What was the work done on the coffer by the rope
A bullet is fired through a board 7.0 cm thick in such a way that the bullet's line of motion is perpendicular to the face of the board, Find the total time the bullet is in contact with the board
Zinc has a work function of 4.30eV. What is the longest wavelength of light that will release an electron from a zinc surface, What is the maximum possible speed of the electron
If the magnetic field in a traveling EM wave has a peak magnitude of 13.3nT, what is the peak magnitude of the electric field
A 386 g object is attached to a spring andexecutes simple harmonic motion with a period of 0.240 s. If the total energy of the system is5.48 J. Find the maximum speed of the object
A uniform-density 8 kg disk of radius 0.20 m is mounted on a nearly frictionless axle. Initially it is not spinning. A string is wrapped tightly around the disk, and you pull on the string with the constant force of 45 N through a distance of 0.7 ..
You are driving east on 8th Street (Tamiami Trail) at a speed of 31. In the rearview mirror, What is the frequency of the siren
An object is thrown vertically upward and has a speed of 20.0 m/s when it reaches two thirds of its maximum height above the launch point, determine The velocity of the object at maximum height
An intergalactic rock star bangs his drum every 1.70s. A person on earth measures that the time between beats is 2.5s. How fast is the rock star moving relative to earth.
A 59.3-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.714, What horizontal pushing force is required to just start the crate moving
A 145 g copper bowl contains 205 g of water, both at 20°C. A very hot 300 g copper cylinder is dropped into the water, causing the water to boil, with 5.40 g being converted to steam.
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