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A battery charger is associated to a dead battery and delivers a current of 5.1 A for 6.1 hours, keeping the voltage across the battery terminals at 12 V in the procedure. How much energy is delivered to the battery?
Suppose the skin temperature of a naked person is 34.3 °C when the person is standing inside a room whose temperature is 21.3 °C. Assuming the emissivity is 0.673, find the net loss of radiant power from the body
Find the electric field (in N/C) at the position of the electron.
Two traveling sinusoidal waves are described by: y1=(5.00m) sin[4.00x-1200t] and y2=(5.00m) cos[4.00x-1200t] Determine amplitude, wavelength, frequency and speed of the resultant wave.
a 6.37-kg box is sliding across the horizontal floor of an elevator. the coefficient of kinetic friction between the
a bar of 24-karat pure gold is supposed to be completely solid. to check this a scientist takes the bar into the lab.
Waves of amplitude 2.4 cm move along a 2-m string that has a mass of 5 g and a tension of 160 N. What is the power transmitted along the string when it vibrates in its fundamental mode? What is the fundamental frequency of the string?
A hockey puck is hit on a frozen lake and startsmoving with a speed of 13 m/s. Exactly5.00 s later, its speed is 4.1 m/s. What is its average acceleration? What is the average value of the coefficient of kinetic friction between puck and ice?
A person whose mass is 72 kg sits on a piston of a hydraulic lift. The radius of this piston is 0.18 m, What is the mass of a puppy
A 1400-kg sports car accelerates from rest to 95km/h in7.4s What is the average prower delivered by the engine
The wavelength of violet light is about 430 nanometers, or 4.30 10-7 m. The frequency of the violet light reflected from a metal surface and thefrequency of the vibrating electron that produces it are the same.What is this frequency?
A beam of parallel rays from a 24 MHz citizens band radio transmitter passes between two electrically conducting (hence opaque to radio waves) buildings located 45.00 m apart. What is an angular width of the beam as it emerges from between the buildi..
a neutron passes two points 1.0 meter apart in 1.0 microsecond. calculate the neutrons energy in units of both joules j
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