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Find the magnitude and direction of the force exerted on a 4.75 µC charge by a 285 N/C electric field that points due east?
What is the pitcher's power output during the pitch and How much work does the pitcher do on the ball
Common light bulbs are designed for use with120 V and are rated by the power dissipated as heat and light. What is the resistance of a 40W bulb?
Thermal energy can shift some of the electrons in a hot semiconductor from valence levels to conduction levels. What effect do these shifts have on the semiconductor's ability to conduct electricity.
A potter's wheel having a radius 0.47 m and a moment of inertia 10.9 kg•m2 is rotating freely at 46 rev/min. The potter can stop the wheel in 7.0 s by pressing a wet rag against the rim and exerting a radically inward force of 68 N. Find out the effe..
A certain refrigerator is rated as being 33% as efficient as a Carnot refrigerator. To remove 107 J of heat from the interior at 0 °C and eject it to the outside at 24 °C, how much work must the refrigerator motor do?
Two conductors are made of the same material and have the same length l. Conductor A is a hollow tube and inside diameter is 1.5mm and outside diameter is 7.30mm; conductor B is a solid wire with radius Rb, what value of Rb is required for the two co..
A pulsar is a rapidly rotating neutron star that continuously emits a beam of radio waves in a searchlight manner. determine the average angular speed of this pulsar
a beam of electron is that through a small hole into vacuum between two parallel plates wich are separated by a
A point charge -Q is at the center of a spherical conducting shell of inner radius R1 and outer radius R2, What is the charge on the inner surface of the shell
You are on a boat in a fog and know there are cliffs ahead of you somewhere, but you cannot see them. How far away are the cliffs
At which wavelengths (or energies) will you observe lines in infrared absorption (a phonon absorbs a photon) and raman scattering spectra? The temperature is 300 k. raman scattering is excited with a cw Argon laser at 514.5 nm.
A spaceship is moving around the Earth in a 500- x 1000km orbit. At apogee, a retrorocket is fired in a direction exactly opposite to the spaceship's velocity vector. How much time elapsed between retrofire and impact
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