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At the familab accelerator in batavia, illinois, protons having momentum 5.00x 10^-16 kg.m/s are held in a circular orbit of radius 1.1km by an upword magnetic field. What is the magnitude of this f
A tube, open at only one end, is cut into two shorter (nonequal) lengths. The piece that is open at both ends has a fundamental frequency of 428 Hz, while the piece open only at one end has a fundam
The electric potential energy stored in the capacitor of a defibrillator is 83 J, and the capacitance is 124 µF. What is the potential difference that exists across the capacitor plates?
A mixture of gases collected over water at 14 degrees celcius has a total pressure of 0.981 atm and occupies 55 ml. How many grams of water escaped into the vapor state? Hint: What is the vapor pre
What mass (in grams) of steam at 100°C must be mixed with 146 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 25.0°C? The specific heat of water
An automoble speedometer has a range of 0 to 100 mph. The uncertainty in any reading is 2 % of the maximum speed. (a) What is the absolute uncertainty at 100 mph?
Calculate the molecular weight of urea, 180 grams of whichdissolve in 1500 grams of water to produce a solution having afreezing-point of -3.72 degrees Celsius.
Why is crossed aldol condensation between acetone and 1-propanalless synthetically useful than the crossed aldol condensationbetween actone and 2,2-dimethylproponal?
You can use the radio waves generated by a hydrogen maser as a standard of frequency. The frequency of these waves is 1,420,405,751.786 Hertz.
Assume that an x axis points horizontally away from the cliff edge and a y axis extends upward. Immediately after Tarzan steps off the cliff, the tension in the vine is 757 N. Just then, (a)
When 15.0g of fluorite (CaF2) reacts with excess sulfuric acid, hydrogen fluoride gas is collected at 744 torr and 25.5 degrees celcius. Solid calcium sulfate is the other product.
An axon is the relatively long tail-like part of a neuron, or nerve cell. The outer surface of the axon membrane (dielectric constant = 5, thickness = 1.00 x 10-8 m) is charged positively, and the i
The change ininternal energy for the combustion of 1.0 mol of octane at apressure of 1.0 atm is 5084.3 kJ. If the change in enthalpy is5074.3 kJ, how much work is done during the combustion?
What frequency does your friend hear if you suddenly start singing at 400Hz?
A point charge of -6 µC is located at x = 1 m, y = -2 m. A second point charge of 12 µC is located at x = 1 m, y = 3 m. (a) Find the magnitude and direction of the electric field at x = -1
A 5.00g sample of liquid water at 25.0degree C is heated by adding 84.0J of energy. The specific heat of water is 4.28J/g*K. What is the final temp of the water in degree C?
A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 10 A, and that of the vacuum cleaner is 4.0 A. (a) Determine the power consumed by the
331 mg of an unknown acid was titrated with 0.110 M sodium hydroxide. The equivalence point is at 25.00 mL. What is the molar mass of the unknown acid?
What is the concentration of hydroxide ion in a solution whose concentration of hydro-gen ion is 1.25 ×10-5 M? Would the solution be acidic or basic? explain.
A kid fires water horizontally from a squirt gun held 1.4 above the ground. It hits another kid 2.3 away square in the back, at a point 0.85 above the ground. What was the initial speed of the water
An electric dipole consists of charges +2e and -2e separated by 0.65 nm. It is in an electric field of strength 3.10 x 106 N/C. Calculate the magnitude of the torque on the dipole when the dipole mome
If titrating 0.1461 g of dl-mandelic acid with 0.05 M sodium hydroxide solution, what would the titration curve look like? Mark end point and half titration point.
If the initial velocity of the ball is horizontal, what minimum magnitude must it have if the ball is to clear the net?
If a chemical reaction, A + B --> C + D, is endothermic, what is the sign of ΔH for the reaction? Would the temperature recorded in the calorimeter well for such a reaction increase or dec
If the torque required to loosen a nut that is holding a flat tire in place on a car has a magnitude of 43.0 N·m, what minimum force must be exerted by the mechanic at the end of a 32.0 cm lu