How much heat must be removed from a system
How much heat must be removed from a system containing 80 grams of water at 60 degrees Celsius in order to convert it to ice at 0 degrees Celsius?
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Another wood sample prepared from an object recovered at an archaeological excavation gives a decay rate of 0.158 disintegration per second per gram of the sample. What is the age of the object?
The system of electrons has the minimum total energy possible. What is the least energy, in eV, a photon must have in order to excite a ground-state electron in this system to the lowest higher state it can occupy.
The free surface of the pool is 25 m above that of the lake. Determine the mechanical power used to overcome frictional effects in the piping.
Sports fans tune to a local sports talk radio station according to a Poisson process with the rate of three fans every two minutes and listen it for an Exponential amount of time with the average of 20 minutes.
The pressure rise across the pump is Delta P = 650 kPa and the motor efficiency is eta = 85%. Determine the mechanical efficiency of the pump.
What is the total amount of heat needed to convert a system containing 30 grams of ice at 0 degrees Celsius into steam at 100 degrees Celsius?
If there is one free conduction electron for every silver atom in the solid state, what is the drift velocity of electrons when a potential difference of 1 x 10-5 V is applied to opposite faces?
Consider two flat circular plates (6 inch diameter), with honey filling a 0.05 inch gap between them. If it takes 1 lbf to start sliding the plates apart at 0.25 inches/sec, what is the viscosity of the honey?
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