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a 1945-w electric hair dryer is designed to work in the united states where the ac voltage is 120 v rms what power is
using the rayleigh criterion one concludes that using fixed wavelength light that it is not possible to resolve details
the vector position of a 350g particle moving in the xy planevaries in the time according to r1 3i 3jt 2jt2 at the
a 10-inch telescope is used to determine if what appears to be one star is actually two stars stars are so far away
what is the mean free path for the molecules in an ideal gas when the pressure is 100 kpa and the temperature is 300 k
the kinetic energy of a proton is 80 of its total energy what is the momentum in kgmiddotms of the protona 15 times
visible light passes through a diffraction grating that has 900 slits per centimeter and the interference pattern is
two pieces of optically flat glass n 150 touch at one edge and a separated by a thin stretched fiber at the opposite
a thin film of mgf2 n138 coats a piece of glass contructive interference is observed for the reflection of light with
an object is placed 100 cm in front of a diverging lens of focal length -25 cm a converging lens of focal length 33 13
a uniform disk with a mass of 840 g and radius 170 cm is rotating on frictionless bearings with an rotational speed of
a 925 n crate rests on the floora how much work is required to move it at constant speed 54 m along the floor against a
a rotating wheel requires 800 s to rotate 260 revolutions its angular velocity at the end of the 800-s interval is 970
the drawing shows a person weight w 598 n l1 0829 m l2 0409 m doing push-ups find the normal force exerted by the
the diameters of the main rotor and tail rotor of a single-engine helicopter are 758 m and 098 m respectively the
you are at the controls of a particle accelerator sending a beam of 300times107 protons mass at a gas target of an
a potters wheel moves uniformly from rest to an angular speed of 023 revs in 310 sa find its angular acceleration in
at one instant the center of mass of a system of two particles is located on the x-axis at x 20 and has a velocity of
an air-filled parallel plate capacitor with a plate spacing of 120 cm has a capacitance of 500 f the plate spacing is
a parallel-plate air capacitor of area a170cm2 and plate separation d340mm is charged by a battery to a voltage 560 v
a charged particle moves in a region of uniform magnetic field along a helical path radius 40 cm pitch 20 cm period
at the start of a cd it is spinning at a rate of 569 rpm revolutions per minute just as the cd finishes playing it is
a fully charged capacitor with a voltage of 120 v is discharged through a resistora what is the voltage across the
a texas cockroach of mass 0168 kg runs counterclockwise around the rim of a lazy susan a circular disk mounted on a
a 876 kg particle with velocity is at x 394 m y 940 m it is pulled by a 865 n force in the negative x direction about