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A speaker fixed to a moving platform moves toward a wall, emitting a steady sound with a frequency of 225 Hz . A person on the platform right next to the speaker detects the sound waves reflected off the wall and those emitted by the speaker. How fast should the platform move for the person to detect a beat frequency of 1.00 Hz ? Take the speed of sound to be 344 m/s.
A kind of glass has an index of refraction of 1.640 for blue light of wavelength 430 nm, what is the angle between the two beams inside the glass
A rocket blasts off vertically from rest on the launch pad with an upward acceleration of 2.30 . At 30.0 after blastoff, the engines suddenly fail, How high above the launch pad will the rocket eventually go
From the top of a 40.0m high cliff, two rocks are simultaneously thrown. One is thrown upwards at 20.0m/s, the other is thrown downwards at 8.0 m/s. How far apart are the two rocks after 1.5 seconds?
A bicyclist on a horizontal plane starts from rest and begins to pedal. The wheel of radius r = 0.345m has a constant angular acceleration of ? = 9.35rad/s2, What is the linear acceleration of the bicycle
What mass (in grams) of steam at 100°C must be mixed with 403 g of ice at its melting point, in a thermally insulated container, to create liquid water at 87°C? The specific heat of water is 4186 J/kg•K. The latent heat of fusion is 333 kJ/kg, and..
Zinc has a density of 7.14 g/cm3, and the mass of a zinc atom is 1.09 10-25 kg. What is the distance between the centers of adjacent atoms
Assuming a forward contract was entered into on December 16, illustrate what would be the net impact on Car Corp's 2009 income statement related to this transaction?
An alpha particle (q = +79e, m = 6.68 x10^-27kg) is fired from a distance of 10 cm at a gold nucleus (q = +79e). find the change in electric potential for the alpha partical
You are standing on a sheet of ice that covers the football stadium parking lot in Buffalo; there is negligible friction between your feet and the ice. If you catch the ball, with what speed do you and the ball move afterwards
You are given a spherical mirror and wish to determine its properties. You place an object on its axis, Find the mirror\'s focal length
A block of mass 0.489 kg is placed on the end of a spring which has a stiffness of 337 N/m. What is the frequency of oscillation
A heavy sled is being pulled by two people as shown in the figure. The coefficient of static friction between the sled and the ground is ?s = 0.571, and the kinetic friction coefficient is ?k = 0.467. what is the sled\'s acceleration
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