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Chemical analysis of a gaseous compound showed that it contained 33.0 percent silicon and 67.0 percent fluorine by mass. At 35 degree Celsius, 0.210 L of the compound exerted a pressure of 1.70 atm. If the mass of 0.210 L of the compound was 2.38 g, calculate the molecular formula of the compound.
The loaded cab of an elevator has a mass of 3.0 x10^3 kg and moves 236 m up the shaft in 23s at constant speed. At what average speed does the force from the cable do work on the cab?
A steel guitar string has a length of 74 cm and thickness of 0.37 mm. It is under 35N tension. Calculate the wave speed in the string. The density of steel rho=7.84 x 10^3 kg/m^3.
Gas in a container is at a pressure of 1.1 atm and a volume of 8.0 m3. What is the work done by the gas if (a) it expands at constant pressure to twice its initial volume
A uniform electric field exists in the region among two oppositely charged parallel plates 1.59 cm apart. A proton is released from rest at the surface of the positively charged plate and strikes the surface of the opposite plate in a time interval 1..
Magnus has reached the finals of a strength competition. In the first round, he has to pull a city bus as far as he can. how much work does the tension force do on Magnus
A light-rail train going from one station to the nexton a straight section of track accelerates from rest at 2.29m/s2 for 13.5 s. What is the distance between the stations
A 3.0kg mass initially traveling in the +x direction at 3.0m/s collides with a 2.0kg mass traveling in the -x direction at 3.0m/s. find The coefficient of restitution between the two masses
A blu-ray disc has mass of 20 g and is 12 cm in diameter. The fastest drives can spin the disc at 10000 RPM after uniformly accelerating it for 1 sec. Find the net torque on the disc
The chamber of a rock-tumbling machine is a hollow cylinder withmass 60 g and radius 7.1 cm. The chamberis closed off by end caps in the form of uniform circular diskseach of mass 22 g.
cobalt-60 with a half-life of 5.27 years is made by exposing a 150 g of cobalt-59 density 8.9 gmcm3 capture
Brillouin zones of rectangular lattice. Make a plot of the first two Brillouin zones of a primitive rectangular two-dimensional lattice with axes a, b = 3a.
The closest distance at which a typical person can focus on an object (called the near point) is about 25.0cm , although this varies considerably with age. Where would the cornea focus the image of an 15.0mm -tall object at the near point?
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