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A large tank is filled with methane gas at a concentration of 0.740 kg/m3. The valve of a 1.70-m pipe connecting the tank to the atmosphere is inadvertantly left open for 16.0 hours. During this time, 9.10x10-4kg of methane diffuses out of the tank, leaving the concentration of methane in the tank essentially unchanged. The diffusion constant for methane in air is 2.10x10-5m2/s. What is the cross-sectional area of the pipe? Assume that the concentration of methane in the atmosphere is zero.
Is it possible for two people to simultaneously operate 850 W hair dryers on the same 120 V circuit without tripping a 15 A circuit breaker? Yes or no? Explain each dryer draws 8.50, 7.1, 3.5, or 4.7A of current, so two such devices will, will n..
In November 2004, the United States tested a scramjet that flew at 10.0times the speed of sound for 11.0s , as measured by engineers on earth. How long did the flight last as measured inside the jet
In tennis, a much softer ball is hit with a racket. Why are the two sets of equipment designed in this way? Can you think of other ball-paddle pairs in sports? How are they designed?
A circular hole is punched out of a circular disc such that the diameter of the circular hole is a radius of the disc.If the diameter of the disc is 10cm,find the centre of gravity of the remainder.
A 75 kg horizintal plank is suppirted at each end. a 126kg giant panda is resting a quarter of tge way from the left end. what is the verticle force being exerted on the left support?
How much work would be required for an external force to move a +0.60 μC test charge from a point midway between them to a point 12 cm closer to either of the charges?
A car wheel with a moment of inertia of 7.85 kg.m^2 is accelerating from 2160 rpm to 5040 rpm in a time of 10.0s. calculate The work done in raising the rotation frequency
A toy of mass 0.155 kg is undergoing simple harmonic motion (SHM) on the end of a horizontal spring with force constant 305 N/m. What is the maximum speed attained by the object during its motion?
A ball is thrown from the top of a cliff at an angle theta with respect to the horizontal direction with an initial speed of 10m/s. The kinetic energy of the ball when it strikes the ground willbe greatest when theta =
Which statements about a neutral atom are correct?
Suppose the space shuttle is in orbit 590 km from the Earth's surface, and circles the Earth about once every 90 min. Find the centripetal acceleration of the space shuttle in its orbit
A student walks 24 m from her math class and then turns 90° and walks 10 m to her locker, that is directly north of her class. What is her total displacement.
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