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The electrric field between the plates of a parallel-plate capacitor is horizontal, uniform, and has a magnitude E. A small object with a charge of -2.8 microC is attached to the string. The tension in the string is .410 N and the angle it makes with the vertical is 16degrees.
A) What is the mass of the object?
B) What is the magnitude of the electric field?
The wave reflects from the speeder's car and returns to the police car, where its frequency is measured to be 280 Hz less than the emitted frequency. Find out the speeder's speed with respect to the ground.
If a positron (a positively charged particle with the mass of the electron) and a proton go through the same potential difference, By what factor is the wavelength shorter
A device used in radiation therapy for cancer contains 1.40 g of cobalt 2760Co (59.9333819 u). Determine the activity of the radioactive material
A walkway suspended across a hotel lobby is supported at numerous points along its edges by a vertical cable above each point and a vertical column underneath. how much does the point move down
A 1200 turn coil of wire that is 3.00 cm in diameter is in a magnetic field that drops from 0.750 T to 0 T in 15.0 ms. What is the induced emf in the coil
At what rate does the Sun radiate energy, given that it is essentially a spherical blackbody with 6.96x10^8m, Use appropriate astronomical data to find the solar radiation per unit area at Earth's orbit
In the quark model of fundamental particles, a proton is composed of three quarks: two "up" quarks, each having charge +2e/3, calculate the potential energy of the subsystem of two "up" quarks
A pinhole camera takes a picture of a building 200 m tall. how far is the camera from the building
What must be the thickness of the liquid layer if normally incident light with? = 504 nm in air is to be strongly reflected
A spaceship with a proper length of 101 m passes an observer at a speed of 0.82770c. What is the length of the ship as seen by the observer
You then maintain a constant speed of 65.0 mph. You pass the patrol car 16 seconds after you at first applied the brakes and are relieved that he doesn't pull out after you. How far away was the highway patrol car when you first saw it.
A planet orbits a star once every 3.44 multiply.gif 107 s in a nearly circular orbit of radius 1.46 multiply.gif 1011 m. determine the tangential speed of the planet
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