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A flat, circular, analog clock face has negative points charges -q, -2q, -3q, -4q,....., -12q fixed at the position of corresponding numbers. the clock hands do not perturb the net field due to the point charges. At what time does the hour hand point in the same direction as the electric field vector at the center of the dial? (hint: use symmetry)
A radar system can measure the time delay between the transmitted and reflected wave pulses from a distant airplane with an accuracy of 1.02 picoseconds. What is the accuracy in the calculated distance to the plane
A light bulb is connected to a 240-V wall socket. The current in the bulb depends on the time t according to the relation I = (2.828 A) sin[(345.4 Hz)t]. What is the average power delivered to the light bulb
The specific heat capacity of a material is 1150 J/(kg·°C). The temperature of 1.0 kg of this solid material is raised by 6.0°C. determine the change in the internal energy of the material
As a new electrical engineer for the local power company, you are assigned the project of designing a generator of sinusoidal ac voltage with a maximum voltage of 120 {\rm V}. What is the minimum rotation rate of the coil so it will produce the req..
the plastic tube in the figure has a cross-sectional area of 6.69 cm2. the tube is filled with water until the short
Planet-X has a mass of 4.25×1024 kg and a radius of 6050 km. What is the Second Cosmic Speed i.e. the minimum speed required for a satellite in order to break free permanently from the planet
A car is going around a corner with a radius of 68 m. At one instant, its speed is 19 m/s and its speed is increasing at a rate of 3.2 m/s^2. What is the total linear acceleration of the car
an object is located 13.0 cm in front of a convex mirror the image being 6.50 cm behind the mirror. a second object
A diving board oscillates with simple harmonic motion of frequency 3.23 cycles per second. What is the maximum amplitude with which the end of the board could vibrate in order that a pebble placed there not lose contact with the board during the o..
The water in a deep underground well is used as the cold reservoir of a Carnot heat pump that maintains the temperature of a house at 294 K. Determine the temperature of the well water
a radio can tune over the frequency range of a portion of mw broadcast band 800 khz to 1200 khz. if its lc circuit has
The mass of Jupiter is 300 times that of the earth, and the diameter is 11 times that of the earth, find the acceleration due to gravity on Jupiter's surface
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