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an elevator is able to raise 1000 kilogram to a height of 20 meter in10 seconda calculate how much work does the
a 1000-w motor power a hoist used to lift cars at a service stationa determine how much time would it take to raise a
an astronomer is making an observation of a new-discovered galactic object part of this observation is the study of the
in a very big closed tank the absolute pressure of the air above the water is 641 x 105 pa the water leaves the bottom
the intensity of the sound from a certain source is measured by two observers located at different positions along a
a rope is wrapped around a wheel of diameter 50 centimeter the wheel is mounted with frictionless hearings on an axle
a cart on a 59 meter long air track moves with a speed of 065 ms bumpers at either end of the track cause the cart to
a long solenoid of length 8m with a cross-sectional area of50x10 -5 m2 contains a total of 52000 turnsnbspa compute the
thick vertical iron pipe has inner diameter of 0065 meter an aluminum disk heated to a temperature of 85oc has a
assume you are part of a team that is trying to break the sound barrier with a jet-powered vehicle which means that it
a plane lands with a speed of 510ms each wheel of the plane has a radius of 125 meter and a moment of inertia of
a quarterback takes the ball from the line of scrimmage runs backwards for 50 yards and then runs sideways parallel to
assume that you release a small ball from rest at a depth d below the surface in a pool of water and the ball rises and
a cart is sitting at the top of an inclined plane 52 m long and meets the horizontal at 12o the cart is then allowed to
neutrons released by a fission reaction must be slowed by collisions with the moderator nuclei before the neutrons can
a muon and its antiparticle annihilate each other producing two gamma-ray photons the kinetic energies of the particles
a 200 kg stone is tied to a 0500-m length of string and swung around a circle at a constant angular velocity of 120
compute what speed must an electron have if its momentum is to be the same as that of an x-ray photon with a wavelength
an iron ball of mass 500 gram at a temperature of 500 degc is cooled by placing it on a block of ice taken from the
two point particles with equal mass m are released from rest a distance d apart and are attracted toward every other
a cube of aluminum 050 meter on a side is immersed one-fourth in water and three-fourths in glycerin determine the
a particle whose mass is 2 kilogram moves in the xy plane with a fix speed of 3 ms in the x-direction along the line y5
a 100 gram object moving to the right at 220 cms creates an elastic head-on collision with a 150 gram object moving in
a neutron star is composed of neutrons and has a density that is about the equal as that of a nucleus determine the
during a shuffleboard game a disk is given an initial speed of 680ms the coefficient of kinetic friction between the