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Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 25 cm apart. The sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 35 cm.
What is the wavelength of the sound?
A 21 kg suitcase is being pulled with constant speed by a handle that is at an angle of 30 degrees above the horizontal. What was the mass of the dog food
Universal beam section: bending moment, maximum stress, radius of curvature, A universal beam section has a second moment of area about its neutral axis of 6487 cm4 and its overall depth is 305 mm
A wire is moving perpendicularly through a magnetic field of strength 0.100 T with speed 60.0 m/s. If the potential difference between the ends of the wire is 2.00 V, what is the length of the wire?
consider the case of a wooden block moving along a horizontal track, how much is the change in mechanical energy
a baseball pitcher throws a fastball across home plate. the ball crosses the plate, calculate the speed of a baseball that takes .010 s to cross home plate, .30 m from front to back
In a 2-D coordinate system with axes the absolute temperature and volume, graph (a) an isobaric (constant pressure) change of one mole of an ideal gas for p=1 atmosphere, and (b) the same when p=2 atmospheres.
The period of motion of an object-spring system is T = 0.546 s when an object of mass m = 254 g is attached to the spring, Find the frequency of motion in hertz
An electron is bound in an infinite well (a box) of width 0.1nm. If the electron is initially in then n = 8 state and falls to the n = 7 state, find the wavelenght of the emitted photon
How much work is done by the Moon's gravitational field as a 1065 kg meteor comes in from outer space and impacts on the Moon's surface
A uniform 1.9-kg rod that is 0.78 m long is suspended at rest from the ceiling by two springs, one at each end. Find the angle that the rod makes with the horizontal
Spark plugs should be tightened to a specified torque of 13.64Nm. You have a wrench that is 0.27 m long, What force must you exert on the wrench
The maximum possible efficiency of a heat engine which exhaust its heat at a temperature of 42.0o is 44.0 percent. What is the minimum value of the temperature
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