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Acid rain is a growing worldwide environmental problem. Naturally, rainwater should have a pH of not less than 5.5, but in the northeastern United States for example, the average pH of the rainwater is about 4.5. The increased acidity of the rain kills plants and animals in lakes and streams, causes increased weathering and decomposition of limestone in statues and on buildings (a major problem for Greek antiquities), and creates problems with the production of fruit and vegetable crops. The major chemical involved is sulfur dioxide, SO2, which combines with rainwater to form sulfuric acid. Although sulfur dioxide has many sources including volcanoes and metal smelting, the main source is believed to be the burning of fossil fuel. The number of moles, n, of sulfur dioxide released from a coal-burning power plant can be determined from the density, d; volume, V; and the molar mass, Mm, of sulfur dioxide gas given off by the power plant.
If a given power plant released sulfur dioxide gas with a volume, V, of 1200 m3 at a density, d, of 2.86 kg/m3 at standard pressure and temperature, how many moles of sulfur dioxide are released?
The pulley system shown in the figure is used to lift a 53 kg crate. Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. Assume that the masses of the chains, pulleys, and ropes a..
a parallel plate capacitor is immersed in sea water. find the ratio of rms conduction current to rms displacement
one mole of an ideal gas is compressed isothermally but irreversibly at 130? from 2.5bar to 6.5bar in a piston device.
A 2.0cm×2.0cm×6.0cm block floats in water with its long axis vertical. The length of the block above water is 1.0cm
What is the magnitude of the force on an electron at a distance of 3.86 Angstrom from the thorium nucleus? What would the magnitude of the force be if the distance of the electron from thenucleus were doubled?
A car of mass 2000kg is lifted up a a distance of 30m by a crane in 1 min. A second crane does the same job in 2 min. Do the crane consume the same or diffrent amounts of fuels
A plane is in a dive. At the bottom of the dive is the maximum acceleration on the pilot. what is the radius of the circular path
Suppose that you hear a clap of thunder 18.4 s after seeing the associated lightning stroke. The speed of sound waves in air is 343 m/s and the speed of light in air is 3.00 x10^8 m/s. How long are you from the lightning stroke.
A block-spring system oscillates with an amplitude of 3.65 cm. Determine the mechanical energy of the system
A 63 kilogram sprinter, starting from rest, runs 41 meter in 7 second at constant acceleration. Find the magnitude of the horizontal force acting on sprinter
lightning occurs when there is a flow of electric charge principally electrons between the ground and a thundercloud.
a 0.120 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. the second ball moves
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