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Two small stereo speakers are 2.8 m apart and act as a double-slit interference experiment with sound waves. If the opposite wall of the room is 7.5 m away and the sound frequency is 1.4 kHz, what is the distance among the two interference maxima nearest the center of the wall? Suppose the speakers act as point sources of sound.
A 12.0 kg box is pulled along a horizontal surface by a force Fp at a 30° angle above the horizontal. Calculate the acceleration of the box assuming a force of magnitude 45 N is applied at the 30° angle
A rocket rises vertically, from rest, with an acceleration of4.0 m/s until it runs out of fuel at an altitude of1300 m. What is the velocity of the rocket when it runs out of fuel
A cube is floating in a lake. IT is observed that 0.4 m of the cube is underwater with the remaining 0.1 m above. The density of water is 1000 kg/m^3. what is the magnitude of the foce that is exerted
Consider a too-small space station that consists of a 2.7m radius rotating sphere. A man standing inside is 1.9m tall and his feet are at 1g. What is the acceleration of his head.
An ideal gas in a container is at a temperature of 78.5°C. What is the average translational kinetic energy of a gas
A loudspeaker of mass 19.00 is suspended the distance of = 1.80 below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of = 3.50. What is the tension in each of the cables.
One 20-year-old twin brother takes a space trip with a speed of 0.80c for 30 years according to a clock on the spaceship. Upon returning to the Earth, what is his own age and the age of the Earth-based twin brother?
Review Conceptua lExample 8 before solving this problem. Suppose unpolarized light of intensity 251 W/m2 falls on the polarizer in the figure, and the angle inthe drawing is 25.0°. What is the light intensity reaching the photocell?
A water wave passing a point causes a cork to bob up and down through a total distance of 1 m, completing one cycle every 1.5 sec
as a laudably skeptical physics student you want to test coulombs law. for this purpose you set up a measurement in
A child wants to pump a bicycle tire so that its pressure is2.5x10^5 Pa above that of atmospheric pressure. what force must the child exert
What is the pressure at a depth of 5000 in the ocean? What is the fractional volume change of seawater at this pressure? What is the density of seawater at this pressure
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