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1. A test tone used on a radio has a frequency of 951 Hz. What is the wavelength of this sound in air at normal room temperature (20 C)?
A cell phone transmits at a frequency of 1.28 108 Hz. What is the wavelength of the electromagnetic wave used by this phone
A system of 1610 particles, each of which is either an electron or a proton, How many electrons are in this system
An open organ pipe and an organ pipe that is closed at one end both have lengths of 0.48m at 20 C
Explain how Karl lifed th cement. How much time would it take for the police officer to catch the speeder, assuming that the speeder maintains a sonstant speed? How fast will the police officer be traveling at this time.
a stell ball of mass m suspended by a thread of lenght l. the ball is then released when the thread is horizontal. at the bottom of this path, find the speed of the block just after collision
What is the force of friction and its coefficient of friction if a 5 kg box slides on a horizontal plane when its speed decreases 1.5ms-1 in a second?
At time 0 a grinding wheel has an angular velocity of 30. It has a constant angular acceleration of 35 until a circuit breaker trips at time = 2.20. From then on, wheel turns through an angle of 428 as it coasts to a stop at a constant angular dec..
A woman on a bridge 71.0 m high sees a raft floating at a constant speed on the river below. She drops a stone from rest in an attempt to hit the raft. The stone is released when the raft has 6.60 m more to travel before passing under the bridge. ..
A dog pulls on a pillow with a force of 2.2 N at the angle of 40° above the horizontal. Find the x and y components of the force.
Wanting to invite Juliet to his party, Romeo is throwing pebbles at her window with a launch angle of 73° from the horizontal, What is the initial speed of the pebbles
A bowling ball weighing 71.6 is attached to the ceiling by a rope of length 3.71 . The ball is pulled to one side and released, What is the acceleration of the bowling ball
A rotating cylinder about 16 {rm km} long and 8.4 km in diameter is designed to be used as a space colony. With what angular speed should it rotate so that the residents on it will experience the similar acceleration as a result of gravity as on E..
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