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a stamp collector is viewing a stamp with a magnifying glass held next to her eye her near point is 25 cm from her eyea
to throw the discus the thrower holds it with a fully outstretched arm starting from rest he begins to turn with a
the yellow light from a helium discharge tube has a wavelength of 5875 nm when this light illuminates a certain
an electron with velocity v 300 200 0 ms moves in a region where the magnetic feild is b 0 12 28 x 10-4 t determine
the figure shows the blade of a chain saw the rotating sprocket tip at the end of the guide bar has a radius of 00343 m
an open train car with a mass of 2210 kg coasts along a horizontal track at the speed 247 ms the car passes under a
the drawing shows three identical springs hanging from the ceiling nothing is attached to the first spring whereas a
a large storage tank is filled to a height 81 cm the tank is punctured with a small hole at a heiht of 38 cm from the
a 750-nc point charge is located 180 m from a 420-nc point charge a find the magnitude of the electric force that one
a particle with a charge of 332 microc moves with a speed of 618 ms in the positive x direction the magnetic field in
a roofer is working on a roof that slants at 390 above the horizontal he accidentally nudges his 890n toolbox causing
when a grating is used with light that has a wavelength of 541 nm a third-order maximum is formed at an angle of 300deg
question 4 for the composite beam of problem 3 check all the statements below that are true answer a at the
a refracting telescope has an objective and an eyepiece that have refractive powers of 125 diopters and 300 diopters
the maximum angular magnification of a magnifying glass is 120 when a person uses it who has a near point that is 250
a man is trying to get his car out of mud on the shoulder of a road he ties one end of a rope tightly around the front
a 10kg baby is perched at the rim of a 40kg disk the disk rotates freely in a horizontal plane at 1 revs the baby
the pilot of an aircraft wishes to fly due west in a 500 kmh wind blowing toward the south the speed of the aircraft
a charged ion has a mass of 25x10-26 kg and charge 125x10-19 c after being accelerated by 250 v it enters a b-field of
although there are a lot of ways to detect planets can someone further expand on the techniques and methods used to
a velocity selector is connected to a mass spectrometer the electric field in the velocity selector is 950 vm calculate
a 200 meter long wire loops carrying a current of 200 a is in the shape of an equilateral triangle if the loop is
a car goes around a curve on a road that is banked at an angle of 307deg even though the road is slick the car will
some bacteria are propelled by biological motors that spin hair-like flagella a typical bacterial motor turning at a
a string of length l which is clamped at both ends and has a tension t is pulled aside a distance h at its center and