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a figure skater begins spinning counterclockwise at an angularspeed of 47 pi rads during a 49 s interval she slowly
while testing speakers for a concert tomaacutes sets up two speakers to produce sound waves at the same frequency which
a 100 kg block is suspended from a string and immersed in water the block has a volume of 002 m3 the water density is
a laser beam with vacuum wavelength 600 nm is incident from air onto a block of glass the line of sight of the
a beetle sits at the top of a bicycle wheel and flies away just before it would be squashed assuming that the wheel
an 800 m 200 n uniform ladder rests against a smooth wall the coefficient of static friction between the ladder and the
an astronaut has two objects that are identical in all respectsexcept that one is painted black and the other is
a cube of edge length 30 cm is positioned there is a uniform magnetic field 80t throughout the region of 30 degrees
by measuring the spectrum of wavelengths of light from our sun we know that its surface temperature is 5820 k by
in a physics lab experiment a student immersed 207 one-cent coins each having a mass of 300 g in boiling water after
two objects with masses of 400 kg and 500 kg are connected by a light string thatpasses over a frictionless pulleya
a steel train rails are laid in 122 m -long segments placed end to end the rails are laid on a winter day when their
in the figure below the cube is 200 cm on each edge four straight segments of wire-abbccd andda-form a closed loop that
your friend needs advice on her newest acoustic sculpture she attaches one end of a steel wire of diameter 398 mm and
two neutrons are in an infinite square well with l20 fm what is the minimum total energy that the system can have
in the figure below a ldquosemi-infiniterdquo nonconductingrod that is infinite in one direction only has uniform
the most intense beam of light that can propagate through dry air must have an electric field whose maximum amplitude
the current flowing in a solenoid that is 23 cm long and has a radius of 2 cm and 300 turns decreases from 2 a to 1 a
a man holds a pail of water by the handle and whirls it around avertical circle of radius 084 m at constant speed what
an ac power source with vm 220 v and f 600 hz is connected in a series rlc circuit the resistance r inductance l and
a pacific north west home has a solar photovoltaic pv systemthat produces 1045 mwh of usable electricity peryear their
two point charges q1 40 c and q2 -80 c are placed along the x-axis at x1 0 m and x2 020 m respectively what is the
amotorist drives along a straight road at a constant speed of 150ms just as she passes a parked motorcycle officer the
the mass of hot-air balloon and its occupants is 320 kg excluding the hot air inside the balloon the air outside the
an airplane propeller is 308 in length from tip to tip and has a mass of 142 when the airplanes engine is first