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A vacuum cleaner is plugged into a 120-V socket and uses 3.0Aof current in normal operation when the back emf generated by theelectric motor is 72V. Find the coil resistance of the motor.
A glass plate 2.5 cm long is separated from another glass plate by a strand of someone's hair (diameter 0.010 mm). How far apart are the adjacent interference bands
Excited states do not in general live very long before they decay.Suppose a certain excited state lives just 10^-7 s. In that case weknow the time when the atom is in the excited state quiteaccurately--to within ?t=10^-7 s. That means there is a ..
A very large number (N+1) polaroids are arranged in a sandwich. Determine the output irradiance from the sandwich
A proton (mp=1.67x10-27 kg, qp=+e=1.6x10-19 C) and an alpha particle (m=6.64x10-27 kg, q=+2e=2x1.6x10-19 C) are initially at rest and separated by a distance of ri=4.0x10-15 m and they are both released simultaneously.
The power stroke of the myosin protein on an actin filament that generates tension in a muscle appears to be a 10 nm displacement generated by about a 1 pN force. Each power stroke is accompanied by the splitting of one ATP molecule which releases..
How long would it be on the incline before it arrives back at bottom.
a 2.00 kg projectile is fired at an angle of 20.0deg above the horizontal. what is the magnitude of the net force
Compute the heat absorbed by the gas and work done by the gas during expansion.
A spaceship moves radially away from Earth with acceleration32 m/s2. How long does it takefor the sodium streetlamps (λ congruent 589 nm) on Earth to be invisible (with a powerfultelescope) to the human eye of the astronauts? The range of visiblewave..
An incident photon of energy 8 eV knocks out the electron from metal surface with KE of 7 eV, Find the work function of the metal surface in eV
a 0.230-a current is charging a capacitor that has circular plates 10.9 cm in radius. the plate separation is 4.00 mm.a
A proton with a speed 1.5 x 10^5 m/s falls through a potential difference of 100 volts, gaining speed. What is the speed reached
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