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Q. The wave function on a taut string is y(x,t) = (0.50m)sin(12 ? t-3 ? x+?/4) where x is in meters and t in seconds.(a)What is the speed and wavelength of the wave?(b)What is the average rate at which energy is transmitted along the string if the linear mass density is 70 g/m? (c)What is the energy contained in each cycle of a wave?
Q. On a workday the average decibel level of a busy street is 69 dB, with 102 cars passing a given point every minute. If the number of cars is condensed to 39 cars every minute on a weekend, what is the decibel level of street?
A 9300 kg boxcar traveling at 20m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 10 m/s. What is the mass of the second car.
State your answer in terms of and Use three significant figures in the numerical coefficient.
A subway train is traveling at 83 km/h when it approaches a slower train 46m ahead traveling in the similar direction at 23 km/h.If the faster train begins decelerating at 2.1 meter per second square while the slower train continues at constant s..
A computer is reading data from a rotating CD-ROM. At a point that is 0.030m from the center of the disk, centripetal acceleration is 120m/s2. What is the centripetal acceleration at a point that is 0.05 m from the center of disc.
An Atwood machine consists of two masses, = 7.1 and = 8.7 , linked by a cord that passes over a pulley free to rotate about a fixed axis. The pulley is a solid cylinder of radius = 0.40 and mass 0.70 .Determine the magnitude of the acceleration of..
A charge of -3.80 nC and a charge of -6.00 nC are separated by a distance of 60.0 cm. Find out the position at which a third charge of +7.30 nC could be placed so that the net electrostatic force on it is zero.
In a physics laboratory experiment, a coil with 200 turns enclosing an area of 12.0 cm^2 is rotated from a position where its plane is perpendicular to the earth's magnetic field to one where its plane is parallel to field.
A block with mass m = 19.0 kg slides down an inclined plane of slope angle 17.8 ° with a constant velocity. It is afterwards projected up the same plane with an initial speed 1.35 m/s. How far up the incline would the block move before coming to rest..
What is its velocity at impact? What will its average velocity be? What will its average speed be.
A 55 year old woman who is complaining of intermittent flushing, itching and heartburn for several months. Mega dosing of that of the following vitamins may result in these symptoms.
Blocks with masses of 2.0 , 4.0 , and 6.0 are lined up in a row on a frictionless table. All three are pushed forward by a 57 N force applied to the 2kg block.How much force does the 4 block exert on the 6.0 block.
A 40 cm diameter wheel accelerates uniformly from 240 rpm to 360 rpm in 6.5 s. how far will a point on the edge of the wheel have traveled in this time. what is the ratio of the new force to the old force.
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