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74 kg crate slides on a horizontal surface the coefficient of kinetic friction between the surface and the crate is
nasa sends satellites to mars by placing the satellite in a keplerian orbit around the sun such that the perihelion is
a 012 m3 rigid tank initially contains refrigerant r-134a at 1 mpa and 100 quality the tank is connected by a valve to
nerve propagation in your body occurs when large electric field in the cell membranes on neurons 10times107 nc cause
a small plastic sphere charged to -10nc in held 10 cm above small glass bead at rest on a table the bead with a mass of
a line in the x-ray spectrum of gold has a wavelength of 185 pm 185 x 10-7 m the emitted x-ray photons corresponds to a
a 560n force is pulling a 1050kg crate across a horizontal floor the force acts at an angle of 340o above the floor the
the work function for cesium 181 ev is much lower than the work function for other metalsa what is the photoelectric
consider a 0417-kg apple attached to a tree does the apple exert a gravitational force on the earth if so what is the
the inside and outside temperature of a carnot refrigerator are 10c and 25c respectively the refrigerator takes in 200j
a group of backpackers after three days hiking are 35 mi west of their starting position on the first day they hiked
a heat engine takes in 1000j of energy from a hot reservoir and expels 750j of energy to the cold reservoir in each
a non-uniform beam of length 441m and weight 102kg makes an angle of 252 with the horizontal it is held in position by
during the compression stroke of a certain gasoline engine the pressure increases from 100 atm to 50 atm if the process
two small-sized objects are placed on a uniform 900 rm kg plastic beam 300 rm m long as shown in the figure below
suppose a 436 kg alligator of length 38 m is stretched out on a board of the same length weighing 95 n if the board is
robert tell is said to have shot an apple off his sons head with an arrow if the arrow was shot with an initial speed
a crystal is irradiated with x-ray photons with energies of 165 times 10-15 j the atomic planes in the crystal are
two carts a and b of equal mass ma mb 0622 kg are on an air track cart a is moving with speed vi 095 ms towards cart
ceres the smallest identified dwarf planet in the solar system has a radius r 480 km and an acceleration due to
when you ride a bicycle at constant speed almost all of the energy you expend goes into the work you do against the
disk a with a mass of 60kg and a radius of 30cm rotates clockwise about a frictionless vertical axle at 10revs disk b
a mountain climber stands at the top of a 325-m cliff that overhangs a calm pool of water she throws two stones
a small mailbag is released from a helicopter that is descending steadily at 271 msa after 400 s what is the speed of
a certain freely falling object released from rest requires 185 s to travel the last 380 m before it hits the grounda