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Two loudspeakers are located 3.15 m apart on an outdoor stage. A listener is 16.3 m from one and 17.4 m from the other. During the sound chek, a signal generator drives the two speakers in phase with the same amplitude and frequency. The transmitted frequency is swept through the audible range (20 Hz - 20 kHz). The speed of sound in the air is 343 m/s. What are the three lowest frequencies that give minimum signal (destructive interference) at the listener's location? (a) Hz (lowest) (b) Hz (second lowest) (c) Hz (third lowest) What are the three lowest frequencies that give maximum signal (constructive interference) at the listener's location? (d) Hz (lowest) (e) Hz (second lowest) (f) Hz (third lowest)
A 1350 kg cannon, which fires a 70 kg shell with a speed of 606 m/s relative to the muzzle, At what angle with the ground is the shell projected
A 72 skydiver can be modeled as a rectangular "box" with dimensions 25 40 1.8 . What is his terminal speed if he falls feet first
At a certain location, the Earth's magnetic field has a magnitude of 5.8×10?5T, Find the magnitude of the magnetic flux through the top of a desk at this location that measures 140cm by 90
An air conditioner operating between 97F and 72F is rated at 3900 Btu/h cooling capacity. What horsepower is required of the air conditioner motor
A 22 kg block of iron drops out of the back of a pickup truck traveling at 55 mi/h. By roughly how much has the temperature of the iron increased
The 50 cm tall object(arrow) is located 75 cm away from the diverging lens plane ( focal length 50 cm). Calculate the distance to the image of the object
Two children ride on a merry-go-round. One is 2 m from the axis of rotation and the other is 4 m from it. Which child has the larger linear speed and acceleration
The average speed of the atoms in a 3.9 g sample of helium gas is 607 m/s. Estimate the thermal energy of the sample
Oxygen gas having a volume of 1180 cm3 at 47.3°C and 1.00 x 105 Pa expands until its volume is 1900 cm3 and its pressure is 1.08 x 105Pa. determine the final temperature of the sample
It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.220 s, elucidate what is the average force exerted on the ball by the wall?
Two lenses, one converging with a focal length of 20.0cm and one diverging with a focal length of -12.0cm, Find the final image from the second lens. Follow the sign conventions
questiona student standing on a stationary skateboard tosses a textbook with a mass of mb 1.55 kg to friend standing
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