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a 010-kg balloon is filled with helium density 0179 kgm3 if the balloon is a sphere with a radius of 54 m what is the
male rana catesbeiana bullfrogs are known for their loud mating call the call is emitted not by the frogs mouth but by
a nuclear power plant has a maximum steam temperature th of 310 degrees celsius it produces 460 mw of electric power in
there are two answers required for this question a rocket is fired straight up and accelerates upward at 12 ms2 for 18
you have fabricated a one-dimensional well of width 12nm and measurements show that the energy difference between the
a ball is launched straight up with a speed of 2885 miles per hour what is the maximum height reached in
the length of a beam increases by 23mm when its temperature is raised from 295 c to 756 c what is the length of the
a sky diver jumps out of a plane and falls freely for 78 seconds before opening the parachute what is the sky divers
an automobile having a mass of 1000 kg is driven into a brick wall in a safety test the bumper behaves like a spring
a football coach in hopes of improving his kickers performance fills a football with helium rather than air assuming
if an airplane accelerates at 10 ms2 for 82 seconds how far has the plane traveled in that amount of
a heat engine does 50223 j of work per cycle while exhausting 9469 j of waste heat what is the engines thermal
a cannon fires a cannon ball at 61037 ms in a straight line that passes directly over an observers head if the observer
an iron bar of mass 057 kg slides down a frictionless incline 067 m high at the bottom of the incline it collides and
the springs of a 1200 kg car compress 50 mm when its 68 kg driver gets into the drivers seat if the car goes over a
a 60 cm long rod has a 400 kg mass on one end and a 600 kg mass on the other end how far from the center of the rod is
on average each person in the industrialized world is responsible for the emission of 10 000 kg of carbon dioxide co2
a crate of mass 102 kg is pulled up a rough incline with an initial speed of 152 ms the pulling force is 106 n parallel
a water slide launches a child horizontally above a swimming pool the distance from the top of the slide to the launch
a 1500 kg truck cruising at 200 ms approaches a 0450 km long hill inclined at 574 to get to the top the driver puts the
a positively charged particle of mass 660 10-8 kg is traveling due east with a speed of 35 ms and enters a 039 t
an archeologist has discovered an old artifact its carbon-14 content is found to be 417 of that in a fresh sample of
during the the a compact disc cd accelerates from rest to a constant rotational speed of 900 revmin it rotates through
two cars of equal mass collide on a horizontal frictionless surface before the collision car a is at rest while car b
a box of 300n weight is at rest at the bottom of the plank that is 500m long and rises 30 degrees above ground then the