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While testing speakers for a concert, Tomás sets up two speakers to produce sound waves at the same frequency, which is between 100 Hz and 150 Hz. The two speakers vibrate in phase with one another. He notices that when he listens at certain locations, the sound is very soft (a minimum intensity compared to nearby points). One such point is 49.7 m from one speaker and 38.4 m from the other. What are the possible frequencies of the sound waves coming from the speakers? (The speed of sound in air is 343 m/s.) (Enter your answers from smallest to largest.) Hz
A supply plane needs to drop a package of food to scientists working on a glacier in Greenland. How far short of the target should it drop the package
A group of particles is traveling in a magnetic field of unknown magnitude and direction. compute the magnitude and the direction of the magnetic field
Compute the volume charge density of the atmosphere, assuming it to be uniform between 300 and 450 m. (Hint: You may neglect the curvature of the earth. Why?)
The position of a cart that is oscillating on a spring is given by the equation x= 12.3 cm cos [(1.26 s-1)t] . When t= .805s , what are the (a) velocity and (b) acceleration of the cart ?
X rays diffract from a crystal in which the spacing between atomic planes is 0.200nm. What is the angle of the first-order diffraction
presents a model for solving problems such as this one. A 1070-kg van, stopped at a traffic light, is hit directly in the rear by a 733-kg car traveling with a velocity of +1.13 m/s. What is the final velocity of the car and van
A toy car runs off the edge of the table that is 1.6405 m high. The car lands 0.3311 m from the base of the table how long does it take for the car to fall? The acceleration by reason of gravity is 9.80 m/s2.
A rocket of total mass 3180 kg is traveling in outer space with a velocity of 115 m/s toward the Sun. how much mass must be expelled
An electron has a kinetic energy of 6.00 10-17 J. It moves on a circular path that is perpendicular to a uniform magnetic field of magnitude 4.70 10-5 T. Determine the radius of the path
A surface whose work function is 2.8 eV is illuminated by a light whose wavelength is 116 nm. What is the maximum velocity of a photoelectron emitted from the surface? The speed of light is 3 × 10^8 m/s and Planck’s constant is 6.63 × 10?34 J · s. An..
A muon is formed high in the Earth's atmosphere and travels at a speed 0.9 c with respect to the Earth. What is the value of the Lorentz gamma factor associated with the muon's motion
A ball traveling with an initial momentum of 2.5 kg m/s bounces off a wall and comes back in opposite direction with a momentum of -2.5 kg m/s. What is the change in momentum of the ball
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