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At what rate must a cylindrical spaceship rotate if occupants are to experience simulated gravity of 0.52 g? Assume the spaceship's diameter is 41 m, and give your answer as the time needed for one
Calculate the standard emf of a cell that uses the Mg/Mg^2+ and Cc/Cu^2+ half cell reactions at 25°C. Write the equation for the cell reaction that occurs under standard-state conditions.
The first peson is initially moving forward with a speed of 2.50 m/s, and the second person is initially at rest. What are the velocities of the two people after the snowball is exchanged? Disregard
In a coffee-cup calorimeter, 1.40 g of NH4NO3 is mixed with 77.0 g of water at an initial temperature of 25.00°C. After dissolution of the salt, the final temperature of the calorimeter contents
What are (a) the magnitude of the cat's centripetal acceleration and (b) the magnitude of the cat's average acceleration during the time interval t2 - t1, which is less than a period of the motion?
A 15.0 cm cube of sodium metal (density = 0.968 g/ml) is thrown into an acidic lake equivalent to a buffer of 5.00 x10-4 M acetic acid and 8.00 x10-4 M sodium acetate.
A plane flying on a heading(use bearing) of 60 degrees at 150km/h is four hours from it's destination (600km). The plane experiences a 50km/h headwin out of the Northeast at 60 degrees for the next
The Saturn V, developed at NASA Marshall Space Flight Center (MSFC) under the direction of Wernher Von Braun, was the largest in a family of liquid-propellant rockets that solved the problem of gett
A mixture weighing 27.73 mg containing only FeCl2 (FM 126.75) and KCl (FM = 74.55) required 18.49 mL of 0.02237 M AgNO3 for complete titration of the chloride. What is the weight percent Fe in the
A 38.0 kg child swings in a swing supported by two chains, each 3.00 m long. (a) If the tension in each chain at the lowest point is 356 N, find the child's speed at the lowest point.
Bones are recovered from an ancient camp site. They emit 452 cpm(counts/min). Current carbon containing materials measure at 1430 cpm. What is the age of the bones?
A stick of mass m and length 2r is arranged to make a constant angle theta with the horizontal, with its bottom end sliding in a circle on a frictionless ring of radius r. What is the frequency of t
A certain molecule fluoresces at a wavelengh of 400 nm with a half life of 1.0ns. It phosporesces at 500 nm. If the ratio of the transition probabilities for stimulated emission for the S*-->S to
Determine distance traveled by the particle during the time interval t = 0 to t = 4s. (hint: block starts moving from the positive x-axis and then goes back to other way.)
A 5.5 box is on a frictionless 41 slope and is connected via a massless string over a massless, frictionless pulley to a hanging 2.1 weight. What is the tension in the string if the 5.5 box is held
What would be the correlation between the color of your dye solution (crystal violet) and the wavelength of its maximum absorbance in the visible spectrum of the solution? Show your calculations fo
You wish to pass a current through the coil to produce a field that, when combined with the earth's field, creates a net field with the same strength and dip angle (60 below horizontal) as the earth
If this air (the 2500 g) is stored in a cylindrical tank of radius 1.59 what would have to be the length of the tank? (Answer in meters)
What advantages does THF have over using diethyl ether in a grignard synthesis reaction? Why must Grignard reagents be run in an ether solvent?
Assuming that all the energy dissipated by kinetic friction goes into melting a small mass, m, of the ice, and the rest of the ice block remains at -1.5 degrees C, determine the value of m.
What does the term paramagnetism mean? How can one determine experimentally whether a substance is paramagnetic?
A particle moving in a laboratory at 0.8c decays after traveling 3m. How long did it exist as measured by an observer in the laboratory?
A solution of potassium permanganate was standardized by titration with a standard Fe2+ solution at pH 2.0. The iron solution was prepared from 0.7417 g of pure iron wire and required 30.16 mL of th
A solution is prepared by dissolving 10.8 g ammonium sulfate in water to make 100.0 mL of stock solution. A 10.0 mL sample of this stock solution is transferred into a flask and then water was added
If the power output stays constant but the frequency is doubled, what is the amplitude of the wave?