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Two speakers spaced a distance 1.5 m apart emit coherent sound waves at a frequency of 680 Hz in all directions. The waves start out in phase with each other. A listener walks in a circle of radius one meter centered on the midpoint of the two speakers. At how many points does the listener observe destructive interference? The listener and the speakers are all in the same horizontal plane and the speed of sound is 340 m/s. [Hint: Start with determining the maximum path difference between the two waves at points on the circle.]
You are playing raquetball at the rec center. When you are 10 m away from the wall you hit a ball 16 m/s towards the wall at an angle of 30 degrees. How high above the launch point does the ball hit the wall
the heart produces a weak magnetic field that can be used to diagnose certain heart problems. it is a dipole field
q1. what are sunspots and how are they related to suns magnetic field? is a magnetic field stronger weaker in sunspots?
An insulated Thermos contains 138cm3 of hot coffee at 95 °C. You put a 12g ice cube at its melting point to cool the coffee. By how numerous degrees has your coffee cooled once the ice has melted and equilibrium is reached.
A 160 g ball on a 70.70 cm long string is swung in a vertical circle about a point 184 cm above the floor. The string all of a sudden breaks when it is parallel to the ground and the ball is moving upward. The ball reaches a height 543 cm above th..
A person walks first at a constant speed of 4.80 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 3.30 m/s. What is her average speed over the entire trip?
in a series rlc ac circuit the resistance is 33 ? the inductance is 31 mh and the capacitance is 19 microf. the
a a 3 microcoulomb charge is at the coordinates 34 mm. a -4 microcoulomb charge is at the coordinates -25mm. what is
In the standing wave experiment, the length of the string is 1.400 m. When a mass of 80 grams is hung, the 7th harmonic is obtained. find the frequency of the vibrator
questionelectric charge on the earths surface and in the earths atmosphere produces an electric field that on a clear
A cart loaded with bricks has a total mass of 21.2 kg and is pulled at constant speed by a rope. The rope is inclined at 27.2 ? above the horizontal and the cart moves 27.1 m on a horizontal floor. The coefficient of kinetic friction between groun..
An x-ray tube accelerates electrons from rest at 5.0×10 14th m/s(squared) power through a distance of 20cm . (Such high accelerations are possible because electrons are extremely light.) Find the electrons'velocity after this acceleration. Find th..
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