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a 75 kg window cleaner uses a19 kg ladder that is 51 m long he places one end on the ground22 m from a wall rests the
an ideal gas expands isothermally performing 41 x 103j of work in the process calculate the heat absorbed during this
a childs helium-filled balloon escapes at sea level and18oc when it reaches an altitude of 3800 m where thetemperature
a 30 kg girl and a 50 kg boy face each other on friction-free roller skates the girl pushes the boy who moves away at a
a 304 muf capacitor and a 784 muf capacitor are connected in series across a 170 v battery what voltage would be
julio throws his 020kg football in the living room and knocksover his mothers 080 kg antique vase after collision
a 412-kg boy riding a 265-kgskateboard at a velocity of 527 ms across a level sidewalkjumps forward to leap over a wall
a pair of speakers separated by 700 m are driven by the sameoscillator at a frequency of 690 hz an observer
a car initially traveling at 100 meters per second is decelerated at 5 meters per second squared until
when a 210-kg object is hungvertically on a certain light spring described by hookes law thespring stretches 284 cma
a child of mass 15 kg is sitting on a sled while hisbrother pulls it up a snowy hill at steady speed the hillmakes a
a block of mass 250 kg is pushed 220m along a frictionless horizontal table by a constant 180 n force directed 250deg
for lunch you and your friends decide to stopat the nearest deli and have a sandwich made fresh for you with0350 kgof
a long and narrow rectangular loop of wire of width 0080 m ismoving toward the bottom of the screen with a speed of
a 4 kg particle moves at a constant speed of 25 ms around a circle of radius 2 mwhat is its angular momentum about the
a 660 kg person throwsa 00400 kg snowball forward with a ground speed of 320 ms a second person with a massof 590 kg
a convex lens is held over a piece of paper outdoors on asunny day when the paper is held 26 rm cm below the lens the
at a playground a 22 rm kg child plays on a slide that drops through a heightof 25 rm m the child starts at rest at the
within cells small organelles containing newly synthesized proteins are transported along microtubules by tiny
a thin film of polystyrene is used as an antireflective coating for fabulite known as the substrate the index of
two people start at the same place and walk around a circular lakein opposite directions one walks with an angular
weightless bar is 18 meters upward forces of 165n at 3 meters from left and one of 310n at 14 meters from left
an archer shoots arrows at a target some of the arrows stick inthe target while others bounce off assuming that the
in an experiment designed to measure the speed of light a laser is aimed at a mirror that is 580 km due north a
a 14-kg 15-cm-diameter solid sphere is rotatingabout its diameter at 70 revmina what is its kinetic energyb if an