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what are the strength and direction of the electric field at the position indicated by the dot in the figure below in
calculate the final pressure of a sample of water vapour that expands reversibly and adiabatically from 873 torr and
a railroad car of mass 21 104 kg moving at 250 ms collides and couples with two coupled railroad cars each of the same
a photon energy 500kev undergoes compton scattering from the proton that is initially at rest a what is the recoil
a proton is released from rest at the positive plate of a parallel-plate capacitor it crosses the capacitor and reaches
light of wavelength 800nm is incident on a metallic surface if the stopping potential for the photo-electrons ejected
x- rays are created in a standard x-ray tube by accelerating electron across a potential difference of v and having the
a ball of mass 0120 kg is dropped from rest from a height of 125 m it rebounds from the floor to reach a height of 0600
a 200kev electron ie an electron having kinetic energy of 200kev collides with a 200kev positron a particle with
if the laser light wavelength is 1062 this corresponds to a neodymium-yag laser and the pulse lasts for 31 picoseconds
a charged capacitor is connected to a resistor and switch as in the figure below the circuit has a time constant of 160
an astronaut travels to the nearest start system 10 light years away and returns at a speed of 05c how much has the
a crane lifts a 650-rm kg beam vertically upward 23 rm m and then swings it eastward 18 rm m how much work does the
the wavelength of a spectral line measured to he lambda on i earth is found to increase by 50 on a far distant galaxy
a capacitor consists of two plates which are 02mm apart from each other the combined area of the two plates measures
the horse on a carousel is 38 from the central axisif the carousel rotates at 80times102 how long does it take the
determine the temperature at which the resistance of atungstenwire will bethree timesits value at 20degc assume its
if two adjacentnatural frequencies of an organ pipe are determined to be 475 hzand 575 hz calculate the frequency and
a uniform chain with a mass of 123 kg per meter of length is coiled on a table one end is pulled upward at a constant
a well-insulated electric water heater warms 121kg of water from 200deg c to550deg c in270min find the resistance of
an electric heater carries a current of175a when operating at a voltage of 120 vwhat is the resistance of the
a lightbulb has a resistance of 230 when operating with a potential difference of 180v across it what is the current in
after emptying her lung a person inhales 41 l of air at 00 oc and holds her breath how much does the volume of the air
a log of mass 40 kg is dropped into river at 0degc if the relative density of the log is 08 what will be the volume of
in the bohr model of the hydrogen atom an electron in the9thexcited state moves at a speed of270104ms in a circular