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when light of wavelength 360 nm falls on a lithium surface electrons having a maximum kinetic energy of 115 ev are
a what is the surface temperature of betelgeuse a red giant star in the constellation of orion which radiates with a
the cookie you will eat after this exam will have a mass of 186 grams how much energy would this cookie give you if it
a neighborhood transformer on the top of a utility pole transforms 140 kv 600 hz alternating voltage down to 1200 v to
a what is the magnitude of the electric force between a proton and an electron when they are at a distance of 191
the magnetic field due to a 2-a current flowing in a long straight wire is 8 t at a point p a certain distance away
two point charges of magnitude 40 c and -40 c are situated along the x-axis at x1 20 m and x2 -20 m respectively what
prior to launching a stone from a sling a bolivian native whirls the stone at 30 revolutions per second around a circle
engineers have proposed that large flywheels be used for the temporary storage of surplus energy generated by electric
a transformer has 330 primary turns and 1340 secondary turns the input voltage is 120 v and the output current is 150 a
the big bang theory suggests leftover background radiation this corresponds to the baseline temperature of space which
the nearest star to earth is proxima centauri 43 light years awaya at what constant velocity must a spacecraft travel
suppose you decide to travel to a star 85 light years away at a speed that tells you the distance is only 25 light
when you drop two balls at once why doesnt only one marble come off the end twice as fast write down the kinetic energy
suppose you are listening to the wkar fm radio station on a car radio the carrier frequency of the transmission is 905
a terrestrial telescope uses an objective and eyepiece with focal lengths of 42cm and 60cm respectivelya what should
a hydrogen atom initially in its ground state n1 absorb a photon and ends up in the n3 statewhat is the energy of the
determine the initial rate of heat transfer from a hot pack to a patient due to thermal conduction through the toweling
a cord of length 10m has two equal-length sections with linear densities of 050 kgm and 100 kgm the tension in the
a proton in a tin nucleus is known to lie with in a sphere whoes diameter is about 12x10-14m what is the uncertainty in
two moles of an ideal monatomic gas expands isothermally at a temperature of 43 c if the heat flow into the gas was 2
a childs toy consists of a spherical object of mass 50 attached to a spring one end of the spring is fixed to the side
when any radioactive dating method is used experimental error in the measurement of the samples activity leads to error
find the wavelength of light emitted by a hydrogen atom when the electron moves from n 7 quantum state to n 5 quantum
a single slit with width 820 nm is illuminated with light of wavelength 555 nm how many minima occur in the angular