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a 69-kg sky diver jumped out of an airplane at an altitude of 070 km she opened her parachute after a while and
the tow rope breaks just as a water skier at a speed of 10 ms enters the bottom of a ramp inclined at 25 degrees the
the scale of a spring balance reading from zero to 180 n is700 cm long a fish suspended from thebalance is observed to
amy 60kg initial velocity of 75 ms is skating towards bob 90kg and initial velocity of 4 ms bob is skating away from
an 80kg man falls our of a 15m tree starting at 0 speed how much potential energy does he start with in the tree when
a circular rod of length 25cm and diameter 8mm is made of 1045grade steel a calculate the stress and strain in the rod
two batting robot sliding on a frictionless surface robot a with a mass 20 kg initially moves at 20 ms parallel to the
a force of 15n is applied at an angle of 30 degrees to the horizontal on a 0750kg block at rest on a frictionless
a tennis ball is struck at the base line of the court 133 m from the net the ball is given an initialvelocity with a
a the elevator begins to accelerate at 15ms2 what is his apparent weightb the elevator continues to move upwards with a
the electric field just above the surface of the charged hollow drum of a photocopying machine has a magnitude e of30e5
an archeological specimen containing 92 g of carbon has an activity of 16 bq how old in years is the
a sample of helium behaves as an ideal gas as it is heated at constant pressure from 273 k to 383 k if 250 j of work is
a laser emits a single 20-ms pulse of light that has a frequency of 283 acute 1011 hz and a total power of 75 000 w how
for a charged hollow metal sphere with total charge q and radius r centered on the originselect trueor false for each
block 1 has mass m1 470 g block 2 has mass m2 510 g and the pulley is on a frictionless horizontal axle and has
a weather balloon is designed to expand to a maximum radius of 24 m at its working altitude where the air pressure is
a centripetal force of 235 n is experienced by a mass of 123 g as it is spun in a circular path with a radius of 250
it is currently popular for automobiles to use 10 ethanol 90gasoline mixtures lsquogasoholrsquo as fuel according
a baseball 015 kg and an electron both have a speed of 75 ms find the uncertainty in position of each of these objects
a centripetal force of 258 n is experienced by a 0625 gram object as it is spun in a circular path with a radius of 350
a strong lightning bolt transfers about 26 c to earth how many electrons are transferred the elementary charge is
a hypodermic syringe contains a medicine with the density of water see figure below the barrel of the syringe has a
a 050kg object is attached to an ideal massless spring of spring constant 20nm along a horizontal frictionless surface
a toy rocket engine lifts a mass of 45 kg to a height of 150 meters at this height the rocket is moving at 267 ms how