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Sound level within the church (1 m away from the chorus) while people are singing, is 100 dB (0.01 W/m^2). Suppose sound waves are emitted uniformly in all directions. Determine the sound level (in
If a watch draws 1.0 X 10-5 amperes continuously for 365 days, determine what mass of Hg(l) is produced when one kind of battery used in the watches contains mercury (II) oxide. As current is d
Determine the force which should be exerted by a chain passing over an 8.94 cm diameter sprocket when the wheel is to attain an acceleration of 4.45 rad/s2?
Discuss what will be the pH of the bath tub due to the above reaction after 30.0 minutes if the bath tub holds 100.0 liters of water and the battery is able to produce an average current of I=0.0960
Identify the amine when a Hofmann degradation of a primary amine forms an alkenes that gives butane and 2-methylpropanal upon ozonolysis and workup under reducing the conditions.
The friend drove her home in the car traveling at 25 mi/hr. Lois took 1.5 hr longer to go to the friend's than to return home. How many hours it took Lois to ride to friend's house?
A jeweler's lens of focal length 2.7 cm is employed as a magnifier. With the lens held close to the eye, find out the following. (i) Determine the angular magnification if the object is at the focal p
Calculate the molality, mole Friction and the molarity of the magnesium nitrate in the solution when an aqueous solution is 15.25% Magnesium Nitrite by mass and the density of the solution is 1.023
Determine the coefficient of H2O when the half-reaction below is balanced in the BASIC SOLUTION with lowest whole number of coefficients? On which side of the equation does water appear?
Determine the numbers of Seconds would be needed for the initial concentration of Fe 3+ to decrease to each of following values: 25% left, 12% left, 6.25% left, 3.125% left?
At 3:10:26 at the altitude of 4200, skydiver opens parachute. Determine skydiver's average speed during 26-second free-fall?
An object of 11.0 kg is joined to a cord which is wrapped around a wheel of radius r = 8.0 cm. The acceleration of the object down the frictionless incline is evaluated to be 2.00 m/s2. Suppose the
The main three beakers are placed in a sealable container where the beaker A is filled with the 100 mL of pure water, beaker B with the 100 mL of 1 moral salt, and the beaker C is filled with the 10
Supposing the engines are cut off if the boat strikes the ramp, determine the speed of the boat as it leaves the ramp?
Determine the numbers of grams of sodium citrate should be added to the 1.00L of 0.297Mcitric acid to form a buffer solution with a pH or 3.17?
When the spring is compressed by 83.0 m just before launch, determine the minimum value for its force constant to accomplish a successful launch? Avoid friction with the tunnel walls and floor.
A water heater is operated by the solar power. If the solar collector has an area of 7.00m2, and the intensity delivered by the sunlight is 700 W/m2, explain how long does it take to increase the temp
The train leaves station at 6:00 P.M. traveling west at 80 mi/h. Passenger train travels same distance in 1.5 h less time than freight train. How long each train takes to make trip?
A bar of gold (bar A) is in thermal contact with a bar of iron (bar B) of the same area and length. One end of the compound bar is maintained at Th =80.0°C while the opposite e
When the molar extinction coefficient of this protein is 349 M/cm at 260nm find the molar concentration of the protein and the percent of the uv light transmitted by the solution.
Calculate the boiling temperature of this liquid when the external pressure is only 0.100 atm. For a given liquid, DHvap is 10,000J/mol and DSvap is 100J/K mol.
A 1ns laser pulse from a neodymium-YAG laser at 532 nm, comprise 5J. i) Evaluate the energy and momentum of all photon.
Aluminum dichloride, AlCl3 Is and electron-deficient molecule. It has a tendency to produce the admire (a molecule made of two of the same units).
In an average human, fundamental life processes need energy to be supplied at a steady rate of 100 W. Determine what daily energy intake, in Calories, is needed to maintain such fundamental processe
The active ingredient in the aspirin is acetylsalicylic acid, HC9H7O4 , a monophonic acid with a Ka = 3.3 X 10^ -4 at 25 degree Celsius.