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two forces are applied to a tree stump to pull it out of the ground force fa has a magnitude of 2240 newtons and points
a light pipe consists of a central strand of material surrounded by an outer coating the interior portion of the pipe
a projectile fired from a gun has initial horizontal and vertical components of velocity equal to 30 ms and 40 ms
the ends of a cylindrical steel rod are maintained at two different temperatures the rod conducts heat from one end to
light of wavelength 650 nm is incident above at an angle of 90 upon a glass plate as shown below the glass plate rests
acharge moves a distance of 21 cm in the direction of a uniform electric field having a magnitude of 220 nc the
a 5kg mass starts from rest and slides down on an inclined plane hits a bumper at the bottom of the inclined plane and
the radius of the moon is 174 x 106 m the radius of the sun is 696 x 108 m the average moon-earth distance is 384 x
a golf ball is driven from a level fairway at a time of 532 s later the ball is traveling downward with a velocity of
two sailboats are approaching a harbor the velocity of the sloop relative to the schooner is 280 ms in a direction
find the theoretical value for the acceleration for an object sliding down an incline plane ignore friction your answer
a nylon guitar string has a linear density of 70 gm and is under a tension of 155 n the fixed supports are distance d
the energy released by alpha decay in a 5000-g sample of 238 pu is to be used to heat 450 kg about 1 gallon of water
block a sits on a table and is in thermal equilibrium with the table the internal energy of block a is 100 j block b
caught in an avalanche a skier is fully submerged in flowingsnow of density 96kgm3 assume that the average density of
you want to build a grandfather clock with a pendulum aweight on the end of a light cable that has one second between
a net force of 132 n acts on a baseball m140g for a period of 0045s what is the magnitude of the change in momentum of
two protons radius 10-15 m are headed directly toward each other with equal speeds use the principle of energy
a light beam is incident on heavy flint glass n 165 atthepolarizing angle calculate the angle of refraction for the
a proton moving to the right at 62 times 105 ms-1 enters a region where there is an electric field of 62 knc-1 directed
a 0275 kg puck initially at rest on a frictionless horizontal surface is struck by a 0220 kg puck that is initially
a satellite moves in a circular orbit around the earth at aspeed of 4260 ms determine the satellites altitude above
a man throws a rock from the top of a cliff that is 500 m above ground level with an initial speed of 270 ms at an
compare a refrigerator set at 2 oc and a freezer set at -18 oc both of which are operating in the room with temperature