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2.0 kg of solid gold (Au) at an initial temperature of 1000K is allowed to exchange heat with 1.5 kg of liquid gold at an initial temperature at 1336K. The solid and liquid can only exchange heat with each other. When the two reach thermal equilibrium will the mixture be entirely solid, or will they be in a mixed solid/liquid phase? Explain how you know using equations and diagrams.
You're the operator of a 1.20×104 V rms, 60 Hz electrical substation. When you get to work one day, What is the rms current leaving the station
An engine absorbs 1.67 kJ from a hot reservoir at 277°C and expels 1.18 kJ to a cold reservoir at 27°C in each cycle, How much work is done by the engine in each cycle
By holding a magnifying glass 32 from your desk lamp, you can focus an image of the lamp's bulb on a wall 1.8 from the lamp. What is the focal length of your magnifying glass
Find the torque of each wheel in a car? The car mass is (3400 lb), The acceleration is (-12m/s^2), and Diameter of the wheel is 28"
q1. an outfielder throws a 0.150 kg baseball at a speed of 50.0 ms and an initial angle of 30.0deg. what is the kinetic
A spelunker is surveying a cave. He follows a passage that goes 178 m straight west, then 214 m in a direction 45° east of south, then 283 m at 30° east of north. determine the fourth displacement
Squaw Valley ski area in California claims that its lifts can move49600 people per hour. estimate the maximum total power needed
Two electrodes are placed in a calcium chloride solution and a potential difference is maintained between them. calculate the current in the solution
A Ferris wheel with radius 14.0 m is turning about a horizontal axis through its center, How much time does it take the Ferris wheel to make one revolution
a balloon is flat and may be assumed to contain no air. it is then connected via a valve toa tank of air at 300 c
An electron has an initial velocity of 3.50 106 m/s in the x direction. It enters a uniform electric field = (400 N/C) , which is in the y direction. (a) Find the acceleration of the electron.
A 20.0-kg package is dropped from a high tower in still air and is "tracked" by a radar system. Determine the force of air resistance on the package
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