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A point source of light is 35.0 cm below the surface of a body of water. Find the diameter of the circle at the surface through which light emerges from the water. Water has an index of refraction
Calcaulate the number of electrons in a small electrically neutral silver pin that has a mass of 10.0 g.silver has 47 electrons per atom.
A 100 mL buffer solution initially has 1.00 M HClO (Ka=3.0*10^-8) and .75 M NaClO. Upon the addition of 100 mL of .10 M NaOH, what is the limiting reactant
An electron in a circular path perpendicular to a constant magnetic field with a magnitude of 1.00mT. The angular momentum of the electron about the center of the circle is 3.000*10^-25. Determine t
The length of a simple pendulum is 0.73 m, the pendulum bob has a mass of 307 grams, and it is released at an angle of 12° to the vertical. With what frequency does it vibrate? Assume SHM. What
An analyst planned to use barium chloride to make up 60.0 mL of 0.500 M Ba^2+ solution but his only source of the chloride in stock was 2.66g of BaCl2* 2H20.Knowing that NO3^- , would not interfere
Find how far from the center of the earth this location is. The mass of the earth is 5.98x10^24 kg. The mass of the moon is 7.35x10^22kg. The mean distance between the moon and the earth is 3.85x10^
A 1-L flask is filled with 1.25g of argon at 25 °C. A sample of ethane vapor is added to the same flask until the total pressure is 1.10atm . What is the partial pressure of ethane, Pethane, in the
A cylindrical shell of radius 7.00 cm and length 230 cm has its charge uniformly distributed on its curved surface. The magnitude of the electric field at a point 23.0 cm radially outward from its
Find the force that the blood vessel must exert on the drop of blood in part (a)
A snowball is launched horizontally from the top of a building at v = 19.7 m/s. If it lands d = 35.5 meters from the bottom, how high is the building?
Find the maximum linear speed of a person sitting on the merry-go-round 6.50 m from the center. and Find the person's maximum radial acceleration.
What constant acceleration does Mary now need during the remaining portion of the race, if she wishes to cross the finish line side-by-side with Sally?
In a HWE reaction, a 1,2-disubstituted alkene was formed in which the olefinic protons exhibited at vicinal coupling of 9.0 Hz in the 1H NMR. what is the stoichiometry of the double bond?
As a student was swirling the flask, some NaOH solution, from buret, spilled on the bench top. What will the effects be on the calculated molarity of NaOH?
the average adult human male has a total blood volume of 5 liter. if the concentration of sodium ion in this individual is 0.135M, what is the mass of sodium ion circulating in the blood .
what is the molar concentration of chloride ions after 225 ml of 0.625 MKCL are mixed with 615 mlof 0.385M MgCl2? The final volume of the solution is 840ml
A diver stands at the end of of a massless diving board. (a) if the mass of the diver is 134kg and the board is 9m long, what is the torque due to gravity on the diving board with a pivot point at t
A 8.65-L container holds a mixture of two gases at 31 °C. The partial pressures of gas A and gas B, respectively, are 0.206 atm and 0.867 atm. If 0.200 mol a third gas is added with no change in
Element Z has two natural isotopes: Z-79 (78.918 amu) and Z-81 (80.916 amu). Calculate the atomic mass of element Z given the abundance of Z-81 is 49.31%.
A planet with mass 5.98 × 1024 kg orbits a star with mass 1.99 × 1030 kg. Determine the kinetic and potential energy at the aphelion.
A 3.40 kg steel ball strikes a wall with a speed of 9.0 m/s at an angle of 60.0° with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.200
What is the amplitude of the temperature fluctuations produced by a sound of intensity, 10 W/m^2, in air at 20 degrees C and std atmospheric pressure?
A motorboat heads due east 13.3 m/s across a river that flows toward the south at a speed of 4.5m/s. What is the magnitude of the resultant velocity relative to an observer on the shore?
A solution, which was made by dissolving 62.07 g of a nonelectrolyte in 500 g of water, exhibits a freezing point of -1.86 °C. What is the molecular weight of this nonelectrolyte compound? For w