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Q1. A small charge (-8.32*10^-6 C) object is tied by a 4.98 cm long piece of thread to the center of a uniformly charged disk. The disk has the radius of 14.8 cm and the concentration of the charge on the surface has a magnitude of 1.21*10^-6 C/m^2. (Neglect gravity here and ignore the white center section until later)
a) what is a sign of the charge on the disk?
b) What is the tension in thread?
Q2. A particle of mass M moves in one dimension along the positive x axis, under the influence of two forces. The first force is a constant force, with magnitude B and direction toward the origin. The second force is an inverse square law, with magnitude A/x2 and direction away from the origin. Calculate the frequency of small oscillations around equilibrium.
The resistance of a copper wire of length L meter is 0.1 ohms. If the diameter of the wire is 0.045cm, find out its specific resistance.
An ice skater is gliding horizontally across the ice with an initial velocity of +7.77 m/s. How much time elapses before her velocity is reduced to +3.00 m/s
A particle moves from an initial position with coordinates x = -2.0 m, y = +3.0 m, What is the magnitude of the average velocity for this displacement
A parallel beam of light containing red (660 nm) and blue (470 nm) wavelengths goes from polystyrene to water, What is the angle between the two colors in water
Archimedes purportedly used his principle to verify that the king's crown was pure gold by weighing the crown while it was submerged in water.
A 1200 crate slides 15 down a ramp that makes an angle of 30 with the horizontal. how much thermal energy is created
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A parallel-plate capacitor has plates with an area of 395 cm2 and an air-filled gap between the plates that is 2.29 mm thick. How much energy is stored in the capacitor
You have a string with a mass of 14.1 g. You stretch the string with a force of 8.63 N, giving it a length of 1.93 m. What is the wavelength of the standing wave you create in the string
Two C1 = 3.7 μF, C2 = 18.7 μF are charged individually to V1 = 14.2 V, V2 = 7.0 V. Calculate the final potential difference across the plates of the capacitors once they are connected
light with a frequency of 3.75 x 10^15 Hz strikes a metal surface and ejects electrons that have a maximum kinetic energy of 5.9 eV
charge of -2.95 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass, which has a radius of 0.097 m. The charges on the circle are -3.85 µC at the position due north and +5.20 µC at the position due ea..
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