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A charge of -5.5 micro-Coulombs is placed at the origin of a coordinate system. Another charge of -5.5 micro-Coulombs is placed at x = +0.22 m, y = +0.15 m. A third charge of +6.9 micro-Coulombs is
A second light source with 1/2 the wavelength of the first ejects photoelectrons with a maximum kinetic energy of 5.27eV. What is the work function of the metal?
A 20.0 kg floodlight in a park is supported at the end of a horizontal beam of mass 20.0 kg. Find the horizontal and vertical forces exerted by the beam on the pole.
What is the molality of chromium(III) chloride in a solution prepared by dissolving 75.2 g chromium(III) chloride hexahydrate (CrCl3· 6H2O) in 250.0 g of water.
Calculate the angular velocity when the person reaches the edge. Calculate the rotational kinetic energy of the system of platform plus person before and after the person's walk.
If a solution is made by adding 83 grams of sodium hyroxide to 750 ml of water what is the percent by mass of sodium hydroxide in this solutions ?
The mass of the rope is 2.50 . The geologist at the bottom of the mine signals to his colleague at the top by jerking the rope sideways. (Do not neglect the weight of the rope.)
At 340 K, Kp = 69 for the reaction H2(g) + I2(g) -> 2HI(g). 50.0 g of HI is injected into an evacuated 5.00-L rigid cylinder at 340 K. What is the total pressure inside the cylinder when the syst
The car first encounters a minimum in reception after it travels 124.0 m. What is the wavelength of the radio waves? Assume that the car and the transmitters are all at the same altitude.
A Fabry-Perot interferometer is to be used to resolve the mode structure of a He-Ne laser operating at 632.8 nm. What is the free spectral range of the instrument under these conditions?
What is the magnitude of the total electrostatic energy of the final 5 charge system? It may be useful to consider the symmetry property of the charge distribution which leads to cancellations amon
If the angular acceleration of the wheel is constant during the motion, how long will it take the wheel to make the one-half revolution? Please provide step-by-step method to solving the problem.
If 3.42 g of K2PtCl4 and 1.61 g of NH3 give 2.02g of cisplatin (K2PtCl4+2NH3→2KCl+Pt(NH3)2Cl2), what is the percent yield of the reaction?
The mover pulls the dolly with constant velocity and with a steady force of 497 N up the ramp. The dolly and ramp constitute a machine. The acceleration of gravity is 9.8 m/s2 . What work does the m
If a balloon containing 1,200 L of gas at 25°C and 760 mmHg pressure ascends to an altitude where the pressure is 380 mmHg and the temperature is 54°C, what the volume will be: (Be sure to u
A 94- astronaut and a 1200- satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.25 directly away from the shuttle. Seven-and-a-half sec
A 40.0 rock slides on a rough horizontal surface at 7.00 and eventually stops due to friction. The coefficient of kinetic friction between the rock and the surface is 0.300. What average thermal pow
A house is 100.0 ft long and 32.0 ft wide, and has 8.0 ft high ceilings. What is the volume of the interior of the house in cubic meters and in cubic centimeters?
Assuming each of the remaining pigs squeal at their original level after 73 of their companions have been removed, what is the decibel level of the remaining pigs?
Assume that the masses of the chains, pulleys, and ropes are negligible and the crate is rising with an acceleration of 2.6 m/s2. 1. Determine the force.
After the flute has passed, the observer hears the sound with a frequency of 415 Hz. What is the speed of the train? The speed of sound in air is 343 m/s.
A charge of -3.0 nC is at the origin and a second charge of 10.0 nC is at x = 5.00 m. Find the magnitude and direction of the electric field halfway in between the two charges.
What mass must be hung from this end of the string to produce two loops of a standing wave?
Hydrochloric acid reacts with zinc metal to form zinc chloride and hydrogen gas. If 345.2 g of zinc metal reacts with 231.6 grams of acid. How many liters of hydrogen gas are produced? How many mole
Suppose 8.00 g of hydrogen is separated into electrons and protons. Suppose also the protons are placed at the earth's North Pole and the electrons are placed at the South Pole. What is the resulti