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An electron traveling at 3.00 x 104 m/s is further accelerated to an excited state by a potential difference so as to reduce its de Broglie wavelength to one-third of its original value.
(a) How much voltage is required to accomplish this? The electron stayed in the excited state (Eexcited = 1.80 eV) 2.00 μs before moving to the ground state.
Find (b) the frequency and (c) the wavelength of the emitted photon.
(d) Find the approximate uncertainty in energy of the photon.
Consider a violin string with a vibrating length of 30 cm. If the speed of a wave on this string is 250 m/s, what is the tension in the string? Hint: You will have to estimate the diameter of the string. Assume the density is the same as that of s..
Suppose the barrel has a length of 0.511 m and an opening whose radius is 2.55 x 10-3 m. A bullet (mass = 2.6 x 10-3 kg) has a speed of 433 m/s after passing through this barrel. Ignore friction and determine the average pressure of the expanding ..
A particle with a mass of 1.5×10?5 kg and a charge of +2.8 microC is released in a (parallel plate) uniform horizontal electric field of 15 N/C. How far horizontally does the particle travel in 0.60s
question1a space station in a form of a large wheel 271m in diameter rotates to provide an artificial gravity of 2.6
Explain (a) how it is possible for a large force to produce only a small or even zero, torque, and (b) how it is possible for a small force to produce a large torque.
A charge 4.97 nC is placed at the origin of an xy-coordinate system, and a charge -2.04 nC is placed on the positive x-axis at x = 4 cm. Find the direction of the total force acting on the third charge
Two charged particles with different speeds move one at a time through a region of uniform magnetic field. Find the ratio of the speeds
the potential difference between two parallel plates is 590 v. an alpha particle with mass of 6.64 10-27 kg and charge
Two automobiles of identical mass approach an intersection. One vehicle is traveling with velocity 14.5 m/s toward the east and the other is traveling north with speed v2i. Find the initial speed of northward-moving vehicle
An electron and a proton are each placed at rest in a uniform electric field of magnitude 556 N/C. Calculate the speed of each particle 47.6 ns after being released
A contact lens is made of plastic with an index of refraction of 1.48. The lens has an outer radiusof curvature of +1.97 cm and an inner radius of curvature of +2.58 cm. What is the focal length of the lens?
A swimming pool requiring a 2.0 hp motor to filter and circulate the water runs for 18 hours a day. What is the monthly electricity cost for running this pool pump
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