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an ac generator produces a sinusoidal voltage at 60 hz with amaximum of 120 va what is the average voltagenbspnbspnbsp
a small piece of dust of mass m 47 microg travels through an electric aircleaner in which the electric field is 527 nc
a source emits sound uniformly in all directions a radial line isdrawn from this source on this line determine the
a spider hangs from a strand of silk whose radius is58x10-6 m the density of the silk is 1100kgm3 when the spider moves
when a light bulb is connected across the terminals of a battery the battery delivers 20 w ofpower to the bulb a
the bremsstrahlung x-ray spectrum of both moand w cut off have zero intensity at about 0035 nm x rays with this
a car moving along a straight stretch of high-way begins toaccelerate at 00345 ms2 it takes the car 709 s to cover 1 km
a spring is standing upright on a table with its bottom end fastened to the table a block is dropped from a height 44
a 50 omega resistor is connected in series with a100 omega resistor this combination is thenconnected in parallel with
the lob in tennis is an effective tactic when your opponent is near the net it consists of lofting the ball over his
in the absence of air resistance a projectile is launched from and returns to ground level it follows a trajectory
a pipe open only at one end has a fundamental frequency of 256 hz a second pipe initiallyidentical to the first pipe is
a toaster uses a nichrome heating wire when the toaster is turned on at 20deg c the initial current is150 a a few
as shown in the figure above a ball of mass 036 g and positive charge q 364 mc is suspendedon a string of negligible
a potato gun is capable of launching a spud farther than a tigerwoods drive if the muzzle speed is 53 ms and it is
suppose a photon with a wavelength of 7155 angstroms strikes ahydrogen anion which has an electron binding energy of
two beetles run across flat sand starting at the same point beetle 1 runs 050 m due east then 090 mat 27deg northof due
a person walks in the following pattern 98 km north then 98 kmwest and finally 30 km south constructthe vector diagram
the right ascension of the star vega brightest star in theconstellation cygnus is 18h 37m 12sa if vegarsquos hour angle
positive charge q is uniformly distrubted around a quarter circle of radius r in the 1st quadrant and negative charge
ball a rolling west at 30ms has a mass of 10kg ball b has amass of 20kg and is stationary after colliding with ball b
the electric potential at the center of a square is 3 v when a charge of q is located at one of the squares corners
the hubble space telescope hst is on a circular low-earth orbit at an elevation h 600 km above the earths surface the
a hot-air balloon is rising upward with a constant speed of 387ms when the balloon is 927 m above the ground the
a typical capacitor in an mp3 player has c 010microf if a charge plusmn43microc is placed on the plates what is the