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1. A 405 Hz sound wave travels through a substance. The wavelength of the sound wave is measured to be 2.7 meters. What is the speed of sound in the substance?
2. A bungee cord is stretched between two poles with a force of 447 N. The length of the cord is 38 meters and it has a mass of 4.4 kg. What is the velocity of a wave on this bungee cord?
A very large number (N+1) polaroids are arranged in a sandwich, The transmission axis of each polaroid is at a constant angle, with respect to its predecessor
The flywheel of an engine has a moment of inertia 2.50 about its rotation axis. What constant torque is required to bring it up to the angular speed of 390 in a time of 8.50, starting from rest? What is its last kinetic energy . Discover an angular..
A generator uses a coil that has 140 turns and a 0.50-T magnetic field. The frequency of this generator is 60.0 Hz, and its emf has an rms value of 120 V. assume that each turn of the coil is a square (an approximation), find out the length of the..
The number of electrons in a copper penny is approximately 10*10^23, How large would the force be on an object if it carried this charge and were repelled by an equal charge one meter away?
A projectile is launched at ground level with an initial speed of 42 m/s at an angle of 26º above the horizontal, What is the x distance from where the projectile was launched to where it lands in m
A 42.00kg pole vaulter running at 13 m/s vaults over the bar. Her speed when she is above the bar is 1.3 m/s. Avoid air resistance, in addition to any energy absorbed by the pole, and determine her altitude as she crosses the bar.
what is the volume of an iron atom. What is the ratio of the mass density of girder A to the mass density of girder B.
when combing your hair, you transfer electrons from the hair onto the comp. is your hair then positively or negatively charged? how about the comb.
hysicists model a magnetic field by assigning to every point in space a vector that represents the strength and direction of the field at that point. Two magnetic fields that exist in the same region of space may be added as vectors at each point to ..
What is the total flux
A horizontal beam of electrons initially moving at 4.0x10^7 m/s is deflected vertically by the vertical electric feild between oppositely charged parallel plates. the magnitude of the field is 2x10^4N/C. What is the verticle deflection d of the el..
As a baseball is being thrown, it goes from 0.0 to 40.0 ms in 0.34 s, What is the acceleration of the baseball
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