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A bar of gold (bar A) is in thermal contact with a bar of iron (bar B) of the same length and area. One end of the compound bar is maintained at Th = 76.5°C while the opposite end is at 30.0°C. Find the temperature at the junction when the energy flow reaches a steady state.
A college student is working on her physics homework in her dorm room. Her room contains a total of 6x 10^26 gas molecules. As she works, her body is converting chemical energy into thermal energy at a rate of 125 W.
A boy whirls a stonein a horizontal circle 1.6 m above the ground, by means of a string1.4 m long. The angle between the string and horizontal plane is 10degrees. The string breaks,the stone flies of horizontally, and strikes the ground 6 m away.What..
there are two telescopes observing at night. the first telescope is 0.3m and has a focal ratio of f8. the second
A spring of spring constant k = 340 Nm-1 is used to launch a 1.5-kg block along a horizontal surface by compressing the spring by a distance of 18 cm. how far does the block slide
A bowling ball and a silver dollar are rolled down a 15 degrees incline which is 5 meters long. Calculate the final linear speed of the silver dollar
A 5 kg block is placed near the top of a frictionless ramp, which makes an angle of 30o degrees to the horizontal. Find the maximum compression of the spring
A large air conditioner has a resistance of 8.0?and an inductive reactance of 14. Find the average power consumed by the air conditioner
A car, initially traveling with a uniform velocity, accelerates at a rate of 1.0 m/s^2 for a period of 12 seconds. If the car traveled 190 m during this 12 second period, what was the velocity of the car when it started to accelerate?
A 208 kg copper bar is put into a smelter for melting. The initial temperature of the copper is 300.0 K. How much heat must the smelter produce to completely melt the copper bar? (The specific heat for copper is 386 J/kg?K, the heat of fusion for cop..
find the relationship between the length h and width a of a regular right triangular prism such that the prism is
When high-energy charged particles move through a transparent medium with a speed greater than the speed of light in that medium, Calculate the speed of the electrons in the water. The speed of light in water is 2.25 108 m/s
As a baseball is being caught, its speed goes from 25 to 0 m/s in 0.007 seconds. What is the force acting on the ball
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