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A sound wave with intensity 4 mW/m2 interferes destructively with a sound wave that has an intensity of 13 mW/m2. What is the intensity of the superposition of the two?
A two-ended "rocket" that is at first stationary on a frictionless floor, with its center an origin of an x axis.
You want to estimate the height of the Empire State Building. You start at its base and walk 15 m away. Then you approximate the angle from the ground at that point to the top to be 88 degrees. How tall do you estimate the Empire State Building to..
A woman weighs 180 lb. Determine the following her weight in newtons and her mass in kilograms
two flexible wires (massless) suspend a 10 cm-long conductor in the magnetic field with b = 4.2T. what is the current to let the wire just have zero tension
Estimate the current in an L-R circuit for t>T if the EMF is (12/T) t for 0
A 7.80-g bullet moving at 610 m/s penetrates a tree trunk to a depth of 5.80 cm, Use work and energy considerations to find the average frictional force that stops the bullet
If the sphere is enclosed in a room whose walls are kept at -5°C, what is the net flow rate of energy out of the sphere
An electric field of 490000 N/C points due west at the certain spot. What is the magnitude of the force that acts on a charge of -8.3 C at this spot.
An electron moves in the xy plane with a speed of 3.75 x 106 m / s at an angle 600 with the x-axis 300 and the axis. A magnetic field of 0.85T is in the positive direction of axis y. Find the magnetic force on the electron.
A loudspeaker of mass 22 {rm kg} is suspended a distance of h = 2 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of l = 3.90 {rm m}.
Presume that the strength of the electric ?eld about an isolated point charge has a certain value at a distance of 4 m.
An aluminum wire with a diameter of 0.105 mm has a uniform electric field of 0.295 V/m imposed along its entire length, What is the drift speed of the conduction electrons
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