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Point A is the midpoint of one of the sides of a square. On the side opposite this spot, two in-phase loudspeakers are located at adjacent corners, as in Figure 27.39. Standing at point A you hear a loud sound because of constructive interference among the identical sound waves coming from the speakers. As you walk along the side of the square toward either empty corner, the loudness diminishes slowly to nothing and then increases again until you hear a maximally loud sound at the corner. If the length of all side of the square is 2.9 m, discover the wavelength of the sound waves.
A heat engine working between 170.0oC and 400.0oC, takes in 1.639×107 J of heat and delivers 4.200×106 J of work per cycle. What is the maximum possible efficiency of an engine working between these two temperatures
A bullet of mass 7.00g is fired horizontally into a wooden block of mass 1.21kg resting on a horizontal surface. compute the initial speed of the bullet
a 28.0 mh inductor has a reactance of 2.20 k.a what is the frequency of the ac current that passes through the
The raising and lowering angular momentum operators, J-hat(subscript +), J-hat(subscript -) are defined in terms of the Cartesian components J-hat(subscript x), J-hat(subscript y), J-hat(subscript z) of angular momentum J-hat by J-hat(+)=J-hat(x)+..
The weight of a 1200 kgcar is supported equally by the four tires, which are inflated to the same gauge pressure. What gauge pressure is required
Two force act on a 5.0kg object sitting on a frictionless horizontal surface. What is the acceleration of the object
Calculate the magnitude of B when the force on wire. The time constant of an RC circuit is 5.5 s. How much time t is required for the capacitor (uncharged initially) to gain one-half of its full equilibrium charge.
you are 1.9 meters tall and stand 3.2 m from a plane mirror that extends vertically upward from the floor. on the floor
A defective starter motor in a car draws 260 A from the car's 12-V battery, dropping the battery terminal voltage to 6.0 V. What will the battery terminal voltage be with a good starter
a well-insulated electric water heater delivers 3.10106cal to its tank of water in 35.0 minutes. find the resistance of
a projectile is fired with an initial velocity of 35 m/s at an angle of 30 degrees above horizontal of a 30 feet tall building. find (a) the max height of the projectile
A light ray in air is incident on a water surface at an angle of 27.7? with respect to the normal to the surface. What is the angle of the refracted ray relative to this normal
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