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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
a 60 kg man is riding on a 30 kg cart traveling at a speed of 27 ms he jumps off with zero horizontal speed relative to
a ball is thrown directly downward with an initial speed of 755 ms from a height of 302 m after what time interval does
a 60g ball of clay is thrown horizontally at 10ms toward a 18kg block sitting at rest on a frictionless hi surface the
an object moves with constant acceleration 330 ms2 and over a time interval reaches a final velocity of 104 msa if its
a child is born after 39 weeks in its mothers womb if the childs birth mass is 35kg how much mass on average does the
a block is connected between two springs on a frictionless horizontally level track the other end of each spring is
a three-step cycle is undergone by 38 mol of an ideal diatomic gas1 the temperature of the gas is increased from 210 k
a snowboarder of mass 820 kg including the snowboards mass slides straight down a double black diamond hill the hill is
a father pulls his identical twins on identical sleds tied one after the other he exerts a force f that makes an angle