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how deep does a point in the middle of the floor of a4-m-deep pool appear to a person standing 28 meters horizontally
light hits the surface of water at an incident angle of35deg with respect to the normal line what is the angle between
a 40 kg crate is pulled across a rough horizontal surface with a force of 350 n at an angle of 25o above the horizontal
suppose you are standing at the bottom of a swimming pool looking up at the surface which we assume to be calm looking
a stone dropped into a pond generates a travelling wave group approximately 1 m long the waves within the group have a
what will be the lowest possible temperature to which very dry air at t 104f can be cooled by evaporation consider p
a series rc circuit has a time constant of 1000 s the battery has an emf of 480 v and the maximum current in the
an electron experiences the greatest force as it travels 102106 ms in a magnetic field when it is moving horizontally
for a mass spectrometer the magnetic field is varied to allow ions of varying mass to reach the detector a different
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
a uniform rod rotates in a horizontal plane about a vertical axis through one end the rod is 763 m long weighs 111 n
water flowing out of a horizontal pipe emerges through a nozzle the radius of the pipe is 24 cm and the radius of the
an electron is moving in the y direction at 47 x 105 ms when it encounters a magnetic field of 25 t coming out of the
a machine part rotates at an angular speed of 066 rads its speed is then increased to 30 rads at an angular
starting from rest a 500 kg block slides 250 m down a rough 300deg incline the coefficient of kinetic friction between
a 15 kg block is held against a spring of force constant 18516 nm compressing it a distance of 180 cm how fast is the
a metal wire has a resistance of 800 at a temperature of 20degc if the same wire has a resistance of 1085 at 90degc
suppose one night that the radius of the earth decreased by two was half as big as normal but the mass stayed the same
a 740 kg spacecraft has total energy -53 1011 j and is in circular orbit about the suna find its orbital radiusb find
what current densities would produce the vector potentials a ksn in the phi direction where k is constant and n is
take the mass of the earth to be 5974x1024 kg the mass of the sun to be 1989x1030 kg the radius of the earth to be
a 290 box is moving to the right with speed 850 on a horizontal frictionless surface at 0 a horizontal force is
when a potential difference of 168v is applied to the plates of a parallel-plate capacitor the plates carry a surface
a certain conductor has 760 1028 free electrons per cubic meter a cross-sectional area of 400 10-6 m2 and carries a
an aluminum wire carrying a current of 60 a has a cross-sectional area of 90 10-6 m2 find the drift speed of the