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an electromagnetic wave has the wavelength of 426 m and intensity of 785 wm2how many photons are there in 1 cubic
a what is the surface temperature of betelgeuse a red giant star in the constellation of orion which radiates with a
a skin diver is 18 m below the surface of a lake a bird flies overhead 76 m above the surface of the lake when the bird
an electron is moving to the north with a speed of 325 ms when it encounters a magnetic field of 5 x 10-5 t the
a patient is having a magnetic resonance imaging scan an mri and has neglected to remove a circular metallic bracelet
converging lens with a diameter of 330 cm forms an image of a satellite passing overhead the satellite has two green
a microscope has an objective lens with a focal length of 1622 mm and an eyepiece with a focal length of 972 mm with
in a photoelectric-effect experiment the wavelength of light shining on an aluminum cathode is decreased from 249nm to
examining your image in a convex mirror whose radius of curvature is 244 cm you stand with the tip of your nose 940 cm
two space stations are at rest relative to each other and are 60 times 107 m apart as measured by observers on the
when a 02 kg mass is suspended from a vertically hanging spring it stretches the spring from its original length of 05
a tennis ball of mass 0060 kg is served it strikes the ground with a velocity of 54ms 120 mih at an angle of 22 degree
a 2 kg uniform flat disk is thrown into the air with a linear speed of 10 ms as it travel the diak spins at 30 revs if
your task in physics laboratory is to make a microscope from two lenses one lens has a focal length of 24cm the other
a gibbon is hanging onto a horizontal tree branch with one arm swings with a small amplitude the gibbons cm is 040m
the model rocket is fired vertically from rest it has a net acceleration of 175ms2 after 15s its fuel is exhausted and
rev 211in a 60 hz circuit such as house wiring the voltage varies from a maximum value to a minimum and back again 60
a flint glass plate n 166 rests on the bottom of an aquarium tank the plate is 1050 cm thick vertical dimension and
light of wavelength 600 102 nm passes through a slit of width 0210 mma find the width of the central maximum on a
on a warm 30 degree celcius spring day you are watching richard take a buzzer and twirl it horizontally around on the
to initiate a nuclear reaction an experimental nuclear physicist wants to shoot a proton into a 12 c nucleus the proton
an oil droplet with 150 excess electrons is observed between two parallel electrodes spaced 140mm apart the droplet
a 15-cm--tall object is 28cm to the left of a lens with a focal length of 14cm a second lens with a focal length of
a carnot engine has 40 g of helium gas as its working substance it operates between two reservoirs of temperatures t1
a large closed bag of plastic contains 010 m3 of an unknown gas at an initial temperature of 10degc and at the same