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when light of wavelength 370 nm falls on a barium surface electrons having a maximum kinetic energy of 086 ev are
the trap-jaw ant can snap its mandibles shut in as little as 16x10-4 s in order to shut both mandibles rotate through a
light with a wavelength of 616 nm passes through a slit 714 mum wide and falls on a screen 180 m away find the linear
the extremes of the ultraviolet portion of the electromagnetic spectrum range from 10 10-7 m to 10 10-9 m find the
an airplane is sent on a rescue mission to help a stranded explorer near the south pole the plane cannot land but
a brick of mass m has been placed on a rubber cushion of mass m together they are sliding to the right at constant
the maximum speed of a 37-kg mass attached to a spring is 067 ms and the maximum force exerted on the mass is 12 nwhat
a 230-g bullet embeds itself in a 130-kg block which is attached to a spring of force constant 780 nm if the maximum
a uniform cylinder whose mass is 50 kg and radius is 020 m is mounted so that it turns without friction on its axis
a vacuum diode consists of a cylindrical cathode of radius 005cm mounted coaxially within a cylindrical anode 045 cm in
a diverging lens with a focal length of -14 cm is placed 10 cm to the right of a converging lens with a focal length of
a weather vane initially at rest has a moment of inertia of 0125 kg middot m2 about its axis of rotation a 635 g piece
an open railroad car of mass 2404 kg is coasting with an initial speed of 18 ms on a frictionless horizontal track it
ceres the smallest identified dwarf planet in the solar system has a radius r 480 km and an acceleration due to
a rubber ball mass 027 kg is dropped from a height of 18 m onto the floor just after bouncing from the floor the ball
a car with a total mass of 192103 kg has wheels of radius 310 cm and moment of inertia 0830 kg middot m2 what is the
the weight of a star is usually balanced by two forces the gravitational force acting inward and the force created by
the distance between two successive maxima of a transverse wave is 120m eight crests or maxima pass a given point along
the speed of sound does not depend on the loudness or the frequency of sound the speed of sound in dry air 0 degree
a train traveling at a constant speed sounds the whistle as it approaches a crossing and continues to sound the whistle
a motorcyclist intends to perform a stunt in which he jumps a river 25 meters wide the motorcyclist must jump from a
a projectile is fired directly upward at such an initial velocity that it reaches half its height of 45 meters
as astronauts travel between the earth and the moon their mass remains constant but their weight diminishes assume the
an astronaut on a distant planet notices that it takes 8 seconds for an object to drop 32 meters beginning from a