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two stars 19 light-years away are barely resolved by a 55 centimeter mirror diameter telescope determine how far apart
a student constructs an astronomical telescope with a magnification of 10 if the telescope has a converging lens of
a weather balloon contains 12 m3 of hydrogen gas when it is released from a location at which the temperature is
determine the velocity of a beam of electrons that goes undeflected when moving perpendicular to an electric and
an object is located 40 centimeter in front of a lens of focal length 40 centimeter a second lens is located 17
to examine a particular blood sample in biology lab a scholar uses a compound microscope set to have a magnification of
a person steps out of the shower and dries off the persons skin with an emissivity of 070 has a total area of 12 m2 and
a positive charge of 440 microc is fixed in place from a distance of 4 centimeter a from the fixed positive charge a
determine how much energy is required to raise the temperature of 1000 gram of ice initially at 20oc to 120oc
in her job as a dental hygienist kathryn uses a concave mirror to see the back of her patients teeth when the mirror is
a copper wire with resistivity 172 x 10-8 omegabullm is 750 meter long and 25 millimeter in diameter evaluate what is
a hydrogen atom is excited to the n 11 level its decay to the n 7 level is detected in a photographic plate obtain
a particle of mass 05 gram charge of 25 x 10-8 c and a speed 6 x 10-4 meter per second find the magnitude and direction
a proton mass 167times10-27 kilogram charge 16 times 10-19 c travelling with speed 1 times 106 ms enters a region of
an object is placed 174 centimeter in front of a convex mirror the image being 061 centimeter behind the mirror a
a certain species of ionized atoms produces an emission line spectrum according to the bohr model but the number of
two small spheres carrying charges of 30 microc and -50 microc are 100 centimeter apart find the potential at a point
an alpha particle helium nucleus moves in a particle accelerator where the potential difference is 25 mv if it starts
two separate radioisotopes a and b with two different half lives t12a302 days and t12b828 days are used in a laboratory
a battery has an emf e and an internal resistance r when the battery is connected to a 20 omega resistor the current
a block is weighing 100 newton is pushed on a horizontal table at constant velocity by a 25 newton force oriented
an electron and a proton move in circular orbits in a plane perpendicular to a uniform magnetic field ba obtain the
a ball of clay weighing 05 kilogram is thrown at a pendulum bob at rest weighing 4 kilogram the clay is thrown with a
a ball is dropped from rest from a tower and falls for 3 sec before it hits the ground estimate how high is the tower
find what angle does the vector that points from the origin of the x-y plane to the point 20 30 make with respect to