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Two small metallic spheres, each of mass m = 0.15 g, are suspended as pendulums by light strings from a common point as shown in the figure below. The spheres are given the same electric charge, and it is found that they come to equilibrium when each string is at an angle of? = 9.0° with the vertical. If each string has length L = 39.0 cm, what is the magnitude of the charge on each sphere? Put the answer in Nc
A 0.75m diameter solid sphere may be rotated about an axis through its center by a torque of 11.5m*N which accelerates it uniformly from rest through a total of 180 revolutions in 16.0 s.What is the mass of the sphere.
In the figure, a stunt car driver negotiates the frictionless track shown in such a way that the car is barely on the track at the top of the loop. The radius of the track is 9.9 m and the mass of the car is 1800 kg. Find the force of the car on t..
a 1.11-microh inductor is connected in series with a variable capacitor in the tuning section of a short wave radio
Nitrogen is a gas of diatomic molecules (N2) that behaves approximately like an ideal gas at standard temperature and pressure (STP: T = 273.15 K, P = 1.0 atm = 1.013x10^5 Pa). The atomic mass of nitrogen is 14 g/mol.
The concrete wall of a building is 0.14 m thick. Thetemperature inside the building is 22°C, while the temperatureoutside is 0.0°C. What is the emissivity of the wall
A 30g bullet strikes a .650kg block attached to a fixedhorizontal spring whose spring constant is 5.90x103N/mand sets it into vibration with an amplitude of 20.0cm. What was the speed of the bullet before impact
When a resistor is connected across the terminals of an acgenerator (107 V) that has a fixedfrequency, there is a current of 0.495 Ain the resistor. When an inductor is connected across the terminals of this same generator, there is a current of 0..
A 20 gram bullet is fired horizontally into a 400 gram block of wood suspended like a ballistic pendulum. Find the velocity of the bullet just before the impact
Find the minimum diameter of an l = 18.9 m long brass wire that will stretch no more than 9.38 mm when a mass of 312 kg is hung on the lower end
Calculate the elecrtic field at one corner of a square 1m on aside if the other three corners have 2micro C charges. Writeyour answers in vector form and also magnitude, angle format
A certain nuclear reactor is capable of producing 1.00 x 109 W of power. During its operation, mass is converted to energy. How much mass is converted in one hour
A 50cm long non-conducting cylinder of radius 4cm has a volume charge density of 30 uC/m^3. A grounded conducting cylindrical shell of radius 6cm is placed concentrically around the charged cylinder.
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