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Two adjacent sources each emit a frequency of 800 Hz in air where the velocity of sound is 340 m/s. How much farther back would source 1 have to be moved thus that an observer in front of the sources hears no sound?
A penny slides off a table 30in high and falls straight to the floor. How long does it take for the penny to fall
A heat engine does 221.39 J of work per cycle while exhausting 609.01 J of heat to the cold reservior. what is the cold reservior temperature in degrees Celsius
suppose that two objects attract each other with a gravitational force of 16 units. what would be the new force of attraction between the two objects
A source emits sound uniformly in all directions. There are no reflections of the sound. What is the total sound power P emitted by the source
When the string is pulled a distance of 40 cm in 2.50 s, the wheel turns though 5 revolutions. what is the average angular velocity of the wheel
a sound wave travels twice as far in neon ne as it does in krypton kr in the same time interval. both neon and krypton
A cylindrically shaped piece of collagen (a substance found in the body in connective tissue) is being stretched by a force that increases from 0 to 2.73 10-2 N. How much work is done by the variable force that stretches the collagen
a 10.5-kg uniform board is wedged into a corner and held by a string at a 50 degree angle. calculate the tension in the
A rod 20 cm long moves in a plane perpendicular to a magnetic field of 0.065 T. The velocity of the rod is perpendicular to its length. Find the speed of the rod if the potential difference between the ends is 6.9 V. ____________ m/s
A U-shaped tube open to the air at both ends contains some mercury with a density of 13,600 kg/m3. Calculate the gauge pressure at the water-mercury interface
find the magnitude of the electric field at a point midway between two charges 24.3 times 10-9 c and 75.5 times 10-9 c
Consider a person on the moon who launches herself into a standing broad jump at 45 degrees. The average force generated during launching is, compute the maximum height of the jump
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