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Q. Sound waves of frequency 569 Hz enter a window 1.25 m wide. The window is in the exact center of one wall of a theater 24 m by 12 m. The window is 12 m from the opposite wall, along which is a row of seats occupied by people. The theater is acoustically prepared to prevent the reflection of sound waves, and the speed of sound is 330 m/s. Two people, on each side of a line directly in front of the window, in the row along the wall hear no sound. What minimumdistance are they from each other? The angle may be too large to use small angle approximation. Answer in units of m.
What mass (in grams) of steam at 100 C must be mixed with 175 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 50.0 C.
A person walks 21° north of east for 3.30km. How far would another person walk due north and due east to arrive at the identical location.
Find the force exerted by the plane on the pilot
What horizontal force acts on the puck after the push
What will transform in terms of the observable properties of the black hole as this process continues
At one instant a bicyclist is 49.0 m due east of a park's flagpole, going due south with a speed of 14m/s. Then 35.0 s later, the cyclist is 49.0 m due north of the flagpole, going due east with a speed of 14m/s.
determine the value of IG. The support at B does not move while the measurement is taken. For the calculation, the horizontal location of G should be determined.
A thin rod consists of two parts joined together. One-fourth of it is silver and three-fourths is gold. The temperature decreases by 21 C°.
what must be done to increase the velocity of a rocket. Calculate the horizontal force that must be applied to produce an acceleration.
A flight attendant pulls her 61N flight bag a distance of 279m along a level airport floor at a constant velocity. The force she exerts is 41N at the angle of 50° above the horizontal.
A 60kg boy and a 45 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 2.3 m/s2, find the magnitude of the acceleration of the boy toward the girl.
A toroidal solenoid has a mean radius of 11.0 cm and a cross-sectional area of 5.00 cm2 and is wound uniformly with 100 turns. A second coil with 500 turns is wound uniformly on top of the first. What is the mutual inductance of these coils.
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