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A wave has an angular frequency of 110 rad/s and a wavelength of 1.80m. Calculate the angular wave number and the speed of the wave.
A king orders a gold crown having a mass of 0.68 kg. When it arrives from the metalsmith, the volume of the crown is found to be 145 cm^3
A silicon sample is doped with phosphorus at 1.17 parts per 1.00*10^6, Calculate the number of free (conduction) electrons per unit volume of the doped silicon in conduction electrons per cm^3
A typical wall outlet is 120 volts in the U. S. Personal MP3 players require much smaller voltages, calculate the number of turns on the secondary coil of the adapter transformer
A loudspeaker of mass 25 {rm kg} is suspended a distance of h = 1.60 {rm m} below the ceiling by two cables that make equivalent angles with the ceiling. Each cable has a length of l = 3.50 {rm m}.
Consider a long wire that makes a right angle (90°) bend. If the wire carries a current I, what is the magnetic field at point A
A 35kg child slides down a playground slide at aconstant speed, The slide has a height of 4.0mand is 7.4m long, find the magnitude of the kinetic friction force acting on the child
a monochromatic beam of light of wavelength 600nm is incident on a diffraction grating with a slit spacing of 1.7*10^-4cm
Where does package hit the ground relative to the point
Two boats start together and race across a 64-km-wide lake and back. Boat A goes across at 64 km/h and returns at 64 km/h. Boat B goes across at 32 km/h, and its crew, realizing how far behind it is getting, returns at 96 km/h. Turnaround times ar..
with what speed would the arrow leave the bow.
The two parallel plates in the figure below are 2.0 cm apart and the electric field strength between them is 2.1 104 N/C. An electron is launched at a 45° angle from the positive plate. What is the maximum initial speed v0 the electron can have witho..
A handball of mass 0.10 kg, traveling horizontally at 25 m/s, strikes a wall and rebounds at 19m/s. What is the change in the momentum of the ball.
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