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a boy and a girl are balanced on a massless seesaw the boy has a mass of 75 kg and the girls mass is 50 kg if the boy
the 5106 solar mass black hole at the center of the galaxy may have gained its first million solar masses in the first
a transparent oil with index of refraction 129 spills on the surface of water index of refraction 133 producing a
neurons in our bodies carry weak currents that produce detectable magnetic fields a technique called
a double slit separated by 00572 mm is placed 130 m from a screena if yellow light of wavelength 587 nm strikes the
global warming is a cause for concern because even small changes in the earths temperature can have significant
a solenoid of radius 16 cm has 351 turns and a length of 10 cmthe permeability of a free space is 125664 times 106 v
a metal strip 626 cm long 0830 cm wide and 0712 mm thick moves with constant velocity through a uniform magnetic field
an electron of mass 911x10-31 kg has an initial speed of 300x105 ms it travels in a straight line and its speed
the secondary voltage of an ignition transformer in a furnace is 145 kv when the primary operates at an rms voltage of
an alternating source drives a series rlc circuit with an emf amplitude of 607 v at a phase angle of 333deg when the
a man holds a double-sided spherical mirror so that he is looking directly into its convex surface 35 cm from his face
a flat coil of wire is used with an lc-tuned circuit as a receiving antenna the coil has a radius of 037 m and consists
consider the scond hand on a clock which is smoothly rotating does it have linear velocity at the tip does it have
two particles are in a uniform electric field whose value is 2500 nc the mass and charge of particle 1 are m1 120 x
what supplies the force to keep an object in circular motion for a car on a turn a ball on a string twirled in a circle
light shines through a single slit whose width is 58 x 10-4 m a diffraction pattern is formed on a flat screen located
in a single-slit diffraction pattern the central fringe is 420 times as wide as the slit the screen is 17000 times
two identical boxcars m 15730 kg are traveling along the same track but in opposite directions both boxcars have a
the light shining on a diffraction grating has a wavelength of 490 nm in vacuum the grating produces a second-order
three and only three bright fringes can be seen on either side of the central maximum when a grating is illuminated
three identical resistors with resistances of 60w are connected to a batter with an emf of 180v and zero internal
a patient is undergoing open-heart surgery a sustained current as small as 25mua can be fatal assume that the heart has
the amount of charge that passes through the filament of a certain lightbulb in 200 s is 167ca find the current in the
the electron and proton of a hydrogen atom are separated by a distance of 5310-11m find the magnitudes of the electric