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When a certain element is bombarded with high-energy electrons, Kα X-rays that have an energy of 8578 eV are emitted. Determine the atomic number Z of the element. Use the Bohr model as necessary.
A light bulb emits light uniformly in all directions. The averageemitted power is 150.0 W. At a distance of 4 m from the bulb,determine (a) the average intensity of the light,(b) the rms value of the electric field, and(c) the peak value of the elect..
A heat pump (a heat engine run backwards) extracts energy from cold air outside (-5.00 degrees celsius), Determine the amount of heat added to the inside air per joule of work done by the motor
A small galvanometer coil of resistance R = 20 ? and full-scale deflection at 1 mA is connected in series with a 4980 ? resistance to build an analog voltmeter
A train started from rest and moved with constant acceleration. At one time it was move traveling at 33.0 m/s, and 160 meter farther on it was traveling at 54.0 m/s. Determine the time required to attain the speed of 33.0 m/s
Draw a Feynman diagram that explains this decay. Create a Feynman diagram for a process where the Λ(+C) (udc) mass = 2285 MeV/c2) decays to a Λo(uds) (mass = 1116 MeV/c2) plus leptons (including neutrinos).
A space probe on the surface of Mars sends a radio signal back to the Earth, a distance of 9.17multiplied by 107 km. Radio waves travel atthe speed of light (3.00 multiplied by 108 m/s). How many seconds does it take for the signal to reach the Earth..
A spacecraft is in orbit around a planet. The radius of the orbit is 2.9 times the radius of the planet (which is R = 71483 km). What is the period of the spacecraft's orbit
The temperature of a monatomic ideal gas with a mass per mole of 0.00750 kg/mol is 298 K. What is the mass of the gas
An electron and a proton are each accelerated through a potential difference of 10.0 million volts. What is the kinetic energy of the electron? What is the kinetic energy of the proton? Calculate the momentum (MeV/c) of the proton using classical equ..
A resistor of resistance 8 x 104 ohm and a capacitor, C = 12μF are connected in series with a 240 Volt power supply. calculate the time it takes to charge the capacitor to 85 percent of its maximum voltage
Consider a system consisting of three masses on the axis. Mass = 1.20 is at = 1.10 ; mass = 2.10 is at = 1.90 ; and mass = 2.70 is at = 2.70. What is the total gravitational potential energy of this system
The transformer consumes 700W under no-load conditions at rated voltage. Determine the value of load current for which the efficiency is maximum, and evaluate this efficiency at a power factor 0.7 lagging.
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