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with each cycle a 2510-w engine extracts 2070 j from a thermal reservoir at 90 degc and expels 1340 j into a thermal
a batter hits a fly ball which leaves the bat 088above the ground at an angle of 62 with an initial speed of 28 heading
a 10kg grindstone in the shape of a uniform cylinder of radius 025m acquires a rotational rate of 18 revs from rest
briefly explain how we modify the energy conservation equation when there is work dont by forces outside of our system
a small conductive rod of length 2 m moves with a constant velocity v17 ms in a direction parallel to a long wire
a particle whose mass is 2 kg moves in the xy plane with a constant speed of 3 ms in the x direction along the line y
a softball of mass 0200 that is moving with a speed of 71 collides head-on and elastically with another ball initially
light propagating in the glass n1 165 wall of an aquarium tank strikes the interior edge of the wall with incidence
a dad pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency
you attach a 100 gram mass to a spring and it stretches 4cm what is the spring constant if you set the spring in simple
waves on a 10 meter rope travel at 19 ms you shake the rope back and forth until you get a standing wave with a single
during the transition of the metal from the boiler to the cup some heat may have been lost to the air if no heat was
the coordinate system and clusters of points obtained during the experiment to study two-dimensional collisions are
electromagnetic radiation is emitted by accelerating charges the rate at which energy is emitted from an accelerating
an ice cube density 917kgm3is sliding down a frictionless in line the sides of the cubes each hace a lenght of 075 m
most of the motion generated by joints in the human body are examples of levers an example of a third class lever is
two vehicles approach an intersection at right angles and collide if vehicle 2 has a mass of 600 kg vehicle 1 has a
a raft is 44cm wide and 62m long when a horse is loaded onto the raft it sinks 27cm deeper into the water what is the
three springs connected in series with k1 30 k2 40 and k3 50 nm are suspended vertically with a 20 kg mass attached
a box of mass 120 kg is sitting on the floor of an elevator which is accelerating upwards at 51 ms2 if the coefficient
a step-down transformer is used to drop an alternating voltage from 10000 to 500 v what must be the ratio of secondary
consider a hydrogen atom with the electron in the n 8 shell what is the energy of this system the magnitude of the
a cube of ice is taken from the freezer at -95degc and placed in a 105 g aluminum calorimeter filled with 323 g of
a rocket a moves past a lab b at a speed of 9c a technician in the lab records 35 s for the time of an event that
a pendulum clock has an aluminum pendulum exactly 10m long when the clock is calibrated perfectly the temperature