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In a specific heat experiment 184.0 grams of aluminum (C=913.0 J/kg.K) at 100.0°C) is mixed with 48.0 g water at 20.0°C. Calculate the equilibrium temperature in °C. Find the entropy change of the aluminum. Find the entropy change of the water. Calculate the entropy change of the system.
A woman stands a distance d from a loud motor that emits sound uniformly in all directions. find the sound intensity level relative to the threshold of hearing
A electric wire with 3.85A current is placed in a magnetic field of strength .97T. What is the force on the wire
A boy tosses a ball in the vertical direction off the side of a cliff. if the initial velcoity of the ball is 15 m/s upward, determine the maximum height sb reached by the ball
In a particular Millikan oil-drop apparatus, the plates are 2.25 apart. The oil used has a density of 0.845 , how many excess electrons did it contain
Two electrons, both with speed 1.0x10^4 m/s, are shot into a uniform magnetic field. The first is shot from the origin out along the + x-axis, compute the magnitude and direction of the magnetic field
When the skateboarder reaches the highest point, how far is this point horizontally from the end of ramp.
What electric potential energy will a fourth charge q4 = 4mC and located at the origin with respect to the other three charges experience and what is the pendulums period for small angle oscillations?
A bullet of mass m= 0.0230 kg is fired along an incline and imbeds itself quickly into a block of wood of mass M= 1.30 kg.obtain the speed of the bullet just before it hits the wood
According to highly accurate GPS-measurements , the continent of North America is drifting with a speed of 1cm/year. estimate the kinetic energy the continental US has
A 25 kg child on a 2.0 m swing is released from rest when the swing supports make the angle of 30.0 degrees with the vertical.
A 1590 kg roller coaster car starts from rest at a height H = 20.0 m above the bottom of a 15.0 m diameter loop. determine the downward force of the rails on the car
A 1.0-cm-diameter pipe widens to 2.0 cm, then narrows to 0.5 cm. Liquid flows through the first segment at a speed of 4.0 m/s. What is the volume flow rate through the pipe
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