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a convex mirror has a focal length of -30 cm find the magnification produced by the mirror when the object distance isa
the planet earth travels in a circular orbit at constant speed around the sun what is the net work done on the earth by
a box of mass is sliding down a frictionless plane that is inclined at an angle above the horizontal as shown in the
knowing the sign of the work done on an object is a crucial element to understanding work positive work indicates that
two long parallel wires 40 cm apart are carrying currents of 10 a and 20 a in the opposite direction what is the
a transverse wave on a string is described by the following wave function y 0105 sin 10 x 5t where x and y are in
a circular coil of wire with 47 turns and a radius of 381 cm is laying flat on a horizontal table there is a uniform
some species use echolocation to determine the position and velocity of objects and prey suppose a bat at rest sends
a system gains 1700 j of heat while the internal energy of the system increases by 6650 j and the volume decreases by
a motorist suddenly notices a stalled car and slams on the brakes negatively accelerating at 64 unfortunately this
two automobiles are equipped with the same single frequency horn when one is at rest and the other is moving toward the
a roller coaster moves 200 ft horizontally and then rises 135 ft at an angle of 300deg above the horizontal next it
a guitar string produces 4 beats per second when sounded with a 350-hz tuning fork and 9 beats per second when sounded
beat frequencies can be used to measure the pitch of an unknown sound even if it normally would be outside the audible
a house is 900 ft long and 43 ft wide and has 80 ft high ceilings what is the volume of the interior of the house in
a 75kg gunsmith uses a friction-less merry-go-round to estimate the speed of a 036g round fired from a gun the
a flywheel with a moment of inertia of 15 kgm2 is on a motor that puts out 24 nm of torque how many rotations will the
a 160-n sphere 020 m in radius rolls without slipping 60 m down a ramp that is inclined at 25deg with the horizontal
a person with mass mp 750 kg stands on a spinning platform disk with a radius of r 177 m and mass md 1880 kg the
at a rock concert a decibel meter registers 120 db when placed 28 m in front of a loudspeaker on the stage how far away
a solid disk of mass m1 95 kg and radius r 02 m is rotating with a constant angular velocity of 310 rads a thin
a dragster starts from rest and accelerates down a track each tire has a radius of 0320 m and rolls without slipping at
a violin string has a length of 0360 m and is tuned to concert g with fg 392 hz a how far from the end of the string
the net work done in accelerating a propeller from rest to an angular speed of 135 rads is 19985 j what is the moment
a particle moves along the x axis it is initially at the position 0180 m moving with velocity 0210 ms and acceleration