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Two point charges are placed along a horizontal axis with the following values and positions: +2 µC at x = 0 cm and - 21 µC at x = 21 cm. At what point (the coordinate) along the x axis is the electric field zero? Expess the answer (in cm) with one decimal place.
At a rock concert, the engineer decides that the music isn't loud enough. He turns up the amplifiers so that the amplitude of the sound, By what percentage does the intensity increase
In a local bar, a customer slides an empty beer mug down the counter for a refill. The height of the counter is h. What was the direction of the mug's velocity just before it hit the floor
Unpolarized light is incident on three polarizers: The first making an angle of 0 degrees with the vertical; If the initial intensity is 1353 W/m2 and the final intensity is 108 W/m2, to the nearest tenth of a degree what is the angle of the middle ..
The escape speed of a particular planet with a radius of 8.600e+6 m is 14,500 m/s. What is the mass of the planet
The air inside a bicycle tire pump has 206 joules of work done on it as 78.6 joules of heat is conducted away from it
A man in a maze makes three consecutive displacements. His first displacement is 6.00 m westward, and the second is 16.0 m northward. find the magnitude and direction of his third displacement
A bullet of mass m = 25 g is fired into a wooden block of mass M = 4.5 kg. The block is attached to a string of length 1.5 m. The bullet is embedded in the block, causing block to then swing.
A lamp (R = 155 ), an electric heater (R = 27 ), and a fan (R = 51 ) are connected in parallel across a 118 V line. What power is expended in the heater
What is the frequency of blue light that has a wavelength of 450 nm and What is the frequency of red light that has a wavelength of 650 nm
Draw a plot of ct vs x showing the positions of the three spaceships and of the light pulses vs. time, in Earth's frame. Find the times, according to the Earth frame, at which the pulses from ships C and A reach ship B.
Two very small objects, whose charges are +1.0 and -1.0 C, Find the magnitude of the attractive force that either charge exerts on the other
A student ate a Thanksgiving dinner that totaled 3000Cal . He wants to use up all that energy by lifting a 30-kg mass a distance of 1.0 m. How many times must he lift the mass
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