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(a) An ideal gas occupies a volumeof 2.0 cm3 at 20°C andatmospheric pressure. Determine the number of molecules of gas inthe container.
molecules
(b) If the pressure is reduced to 1.010-11 Pa (an extremely good vacuum) while thetemperature remains constant, how many moles of gas remain in thecontainer?
mol
In fair weather, over flat ground, there may be a downward electric field of 125 N/C. find the total charge on the Earth and the charge per unit area
The distance to the Andromeda Galaxy is estimated at about 2 x 10(6) light years. A light year is distance traveled by light in one year; if the speed of light is 3 x 10(8) m/s, about how far is it from our galaxy to Andromeda? (1 year =3.15 x 10(..
A rectangular container measuring 22cm multiplied by 48cm multiplied by 72cm is filled with water. What is the mass of this volume of water in kilograms and grams.
In a church choir loft, two parallel walls are 5.70 m apart. The singers stand against the north wall. What width of the north wall can she see
A rock is suspended from a scale reads 20.0 N. A beaker of water is raised up so the rock is totally submerged in the water. What is the density of the rock
A 6000kg truck stands on the deck of an 80000kf ferryboat. Initially the ferry is at rest and the truck is located at its front end. how far will the ferry move forward relative to the water
The lowest outdoor temperature ever recorded on Earth was %u2212128.6 %u25E6F, recorded at Vostok Station, Antarctica, in 1983. What is this temperature on the Kelvin scale
Find out the gravitational potential energy
A broken piano emits frequencies from a low of 32.0 Hz to a high of about 4100 Hz. What is the shortest wavelength if the speed of sound in air is 342.50 m/s? Record the answer to three decimal places and include units in the answer.
A rotating cylinder about 16 {rm km} long and 8.4 km in diameter is designed to be used as a space colony. With what angular speed should it rotate so that the residents on it will experience the similar acceleration as a result of gravity as on E..
A 0.100 kg block is suspended from a spring. When a small pebble of mass 40 g is placed on the block, What is the net force on the pebble when it is at a point of maximum upward displacement
Calculate the number of coulombs of positive charge in 285 cm3 of (neutral) water. (Hint: A hydrogen atom contains one proton; an oxygen atom contains eight protons.)
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