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The potential difference between a storm cloudand the ground is 100 million volts. If a charge of 2 coulombsflashes in a bolt from cloud to Earth, what is the change of potential energy of the charge?
An air duct in a building has a radius of 8 cm and a length of 17 m. What pressure is required to push air through the duct at a flow rate of 1.1 m3/s
A girl is using a rope to pull a box that has mass of 30kg across a level surface with constant velocity. What is the normal force of the floor on the box
An electron moves with velocity v = (3.79E+4i - 5.79E+4j) m/s in a magnetic field B = (-0.905i + 0.559j) T. What is the magnitude of the force on the electron
100 grams of oxygen and 100 grams of hydrogen gas occupy separate, equal sections of 200 liter tank. find the pressure after the reaction ends
A magnetic field near the ceiling points up and is decreasing. Looking up at the ceiling, does non-Coulomb electric field curl clockwise or counter-clockwise.
The peak current through an inductor is 11mA. What is the current if the emf frequency is doubled
A certain kind of glass has nblue = 1.62 for blue light and nred = 1.572 for red light. what is the angle between the red and blue light inside the glass
Monochromatic light of wavelength 683 nm passes through a fast shutter that opens for 10^(-10) s. The light the emerges will no longer be monochromatic. What will be the spread of the wavelengths?
Asteroids can be classified into two broad groups based on their composition and location: carbon-rich asteroids dominate the outer part of the asteroid belt, whereas metal-rich asteroids dominate the inner part of the belt. Analysis of the fragme..
A parallel-plate capacitor having square plates 4.50cm on each side and 8.00mm apart is placed in series with an ac source of angular frequency 620rad/s, What is the resonance angular frequency of this circuit
A 0.157-kg particle undergoes simple harmonic motion along the horizontal x-axis between the points x1 = -0.253 m and x2 = 0.495 m. Find the force constant, k, and the total mechanical energy
An electric dipole consists of charges +2e and -2e separated by 0.78nm. It is in an electric field of strength 3.4 x 106 N/C. Calculate the magnitude of the torque on the dipole
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