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Question1
Two speakers, one directly behind other, are each generating a 268-Hz sound wave. What is the least separation distance between speakers that will produce destructive interference at a listener standing in front of them? Take speed of sound to be 344 m/s.
Question2
A fellow student expresses opinion that because the Suns spectrum has only weak absorption lines of hydrogen, this element cannot be a major constituent of the Sun. How would you enlighten this person? If a red star and a blue star both have the same radius and both are the same distance from the Earth, that one looks brighter in the night sky?
Question3
An anchor hold the boat stationary on a river forms the 30º angle with the river bottom. The anchor line is 100 meters long. Assume the river has a uniform depth, how deep is the river directly below the boat?
A playground carousel is free to rotate about its center on frictionless bearings, and air resistance is negligible. What is the person's mass
What is the separation distance between speaker and listener
Find out the force each hand exerts on the shaft when the shaft is rotating in the horizontal plane about its center at 5×10-2 {rm rev/s}.
For the third circuit, consisting of a single battery and two light bulbs in parallel, how does the brightness of the bulbs compare to the first circuit, What is the current through each bulb
A 2.00kg block is pushed against a 400N/m spring, compressing it 22.0 cm. When the block is released, find the speed of the block just after leaving the spring
A solid disk of radius R and mass 2.66 kg is spinning at angular velocity 66.2 rpm about a vertical axis. What is the mass of the second disk
A fuel pump sends gasoline from a car's fuel tank to the engine at a rate of 6.74x10-2 kg/s. find the speed at which gasoline moves through the fuel line
ou place it in water and it displaces a volume of 20 cubic centimeters of water. What is the hardness of this mineral? describe your answer.
A 1450 N uniform boom is supported by a cable as shown. The boom is pivoted at the bottom, and a 1270 N object hangs from its end. Find the tension in the cable holding up the boom
A model rocket rises with constant acceleration to a height of 3.8 , at which point its speed is 26 m/s How much time does it take for the rocket to reach this height.
A 260-kg piano slides 4.2m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40.
A lens of focal length 15.0 cm is used to create an image of the Full Moon. What is diameter of the image
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