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in 98 s afisherman winds 26 m of fishing line onto a reel whose radius is30 cm assumed to be constant as an
a girl is skipping stones across a lake one of the stonesaccidentally ricochets off a toy boat that is initially at
in san francisco a very simple technique is used to turn around a cable car when it reaches the end of its route the
a pendulum consists of a mass m 0120 kg hangingfrom a flexible string of length l the string is very thin verylight
a sled is initially given a shove up a frictionless 260deg incline it reaches a maximum verticalheight 145 m higher
a drop of water on a countertop reflects light from a flower held280 cm directly above it the flowersdiameter is 190 cm
the drawing shows a collision between two pucks on an air-hockeytable puck a has a mass of 00190 kg and is moving along
about 999 of the solar systems total mass lies in the sun usingdata from appendix estimate what fraction of the solar
the top of a swimming pool is at ground level if the pool is220 m deep how far below ground leveldoes the bottom of the
a cube of side 15 cm floats at the surface between waterand oil the oil has a density of 810 kgm3 if the cube floats
three identical train cars coupled together are rolling eastat 2 ms a fourth car traveling east at 4 ms catchesup with
a what is the escape speed on a sphericalasteroid whose radius is 570 km and whose gravitationalacceleration at the
assume that the earth andthe moon have circular orbits which is almost true and that theperiods of their orbits are 365
a wheel rotates with a constant angular acceleration of315 rads2 assume the angularspeed of the wheel is 185 rads atti
a 500-n weight sits on a small piston of a hydraulic machinethe small piston has area 20 cm2 if the large piston has
a piece of charcoal used for cooking is found at the remains of anancient campsite a 090 kg sample ofcarbon from the
in a large centrifuge used for training pilots and astronauts asmall chamber is fixed at the end of a rigid arm that
some bacteria are propelled by motors that spin hair-like flagellaa typical bacterial motor turning at a constant
if 350 j of heat are added to 63 moles of a monatomic gas at constant volume how much does the temperature of the gas
during an adiabatic process the temperature of 450 moles of a monatomic ideal gas drops from 515degc to 193degc find
an electron collides elastically with a stationary hydrogen atomthe mass of the hydrogen atom is 1837 times that of the
a sperical mirror is polished on both sides when the convex side is used as a mirror the magnification is 18 what is
a sailor strikes the side of his ship just below the waterline hehears the echo of the sound reflected from the ocean
a 2000kg truck traveling at a speed of 6ms makes a 90 degree turn in a time of 4s and emerges from this turn with a
a flat circular coil with 25 turns and a radius of 5 cm lies in the plane of the paper a changing magnetic field is