Making the electric force of repulsion
How many electrons must be removed from each of two 4.3-kg copper spheres to make the electric force of repulsion between them equal in magnitude to the gravitational attraction between them?
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Sketch the process on a p-V or T-s diagram identifying the state points and processes and then, making the "cold air" assumption calculate the following the specific net work transfer.
Deuterium, 2H (2.0140 u), is sometimes used to replace the principal hydrogen isotope 1H in chemical studies.The percent natural abundance of deuterium is 0.015%.
A pendulum is made of a uniform stick of length L. It is allowed to swing in a vertical plane. Where should the pivot be placed on the stick so that the frequency of (small) oscillations is maximum?
Suppose 550 g of aluminum which has been heated to 150 C is added to 100 g of water which is at a temperature of 25 C. What is the equilibrium temperature for this mixture?
An infinitely sharp zone of solute is placed at the center of acolumn at time t = 0. After diffusion for time t1, the standard deviation of the Gaussian band is 1.0mm
Decide if the following random variable is discrete or continuous. Explain your reasoning a) The number of hours spent sleeping each day b) The number of fish caught during a fishing tournament.
Two compounds with partition coefficients of 15 and 18 are to beseparated on a column with Vm/Vs = 3.0 andtm=1 min. calculate the number of theoretical plates needed to produce a resolution of 1.5.
A cargo barge is loaded in a saltwater harbor for a trip up a freshwater river. If the rectangular barge is 3.50 m by 24.0 m and sits 0.600 m deep in the harbor, how deep will it sit in the river?
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