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an electron in a television picture tube travels at 3 x107 ms and is acted on both by gravity and by theearths magnetic
if a simple pendulum with length 13 m makes 88oscillations in 180 s what is the acceleration of gravity at its
a recording engineer works in a soundproofed room that is385 db quieter than the outside ifthe sound intensity in the
for a wavelength of 420nm a diffraction grating produces a bright fringe at an angle of26deg for an unknown wavelength
an electron and a positron each have a mass of 911 x 10-31kg they collide and both vanish with only
when you look down into a swimming pool or lake are youlikely to underestimate or overestimate its depth explain how
a string of length 26 m is fixedat both ends when the string vibrates at a frequency of840 hz a standing wave with6
a 20 -kg lead sphere is hanging from a hook by a thin wire35m long and is free to swing in a complete cirle suddenly it
while looking at her image in a cosmeticmirror dina notes that her face is highly magnified when she isclose to the
the wavelength of yellow sodium light in air is 589 nma what is its frequencyhzb what is its wavelength in glass whose
a machine shop has 129 equally noisy machines that togetherproduce an intensity level of 90 db if the intensity level
a diverging lens f -100 cmis located 210 cm to the left of aconverging lens f 300 cm a268-cm tall object stands to
a thin film of alcohol n136 lies on a flat glass platen151 when monochromatic light whose wavelength can bechanged is
suppose that the proper half life of a certain type of particle is 18mus these particles are produced at one end of a
a concave shaving mirror has a radius of curvature of270 cm it is positioned so that theupright image of a mans face is
your boss at the cut-rate cuckoo clock company asks you whatwould happen to the frequency of the angular shm of the
in a certain binary-star system each star has the a mass of100 x 1030 kg and they revolve about theircenter of mass the
two pieces of steel wire with the same area of transversalsection have lengths l and 2l the wires are fixed in
suppose that a police car on the highway is moving to theright at 27 ms while the speeder is coming up from behind at
suppose that 36 g ofhgmercury at -39degc are dropped into a big bowlthat contains a mixture of water and ice in thermal
a steel ball with mass 400g is dropped from a height of 200monto a horizontal steel slab and it rebounds 160ma
consider a wet roadway banked as in example 524 where thereis a coefficient of static friction of 030 and a coefficient
a hunter is standing on flat ground between two verticalcliffs that are directly opposite of each other he is closerto
a ray of light passes from air through dense flint glass andthen back into air the angle of incidence on the first
in a period of 10s 50e23 nitrogen molecules stike a wall ofarea 80cm2 if the molecules move at 300ms and strike the