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Why is there a Doppler effect when the source of sound is stationary and the listener is in motion? In which direction should the listener move to hear a higher frequency? A lower frequency?
the american standard code for information interchange has 128 characters which are binary coded. if a certain computer
Consider two concentric thin wall steel tubes, the larger one closed at the bottom and the inner one open. What must be the relationship between the radii of the tubes
In Europe the standard voltage in homes is 220V instead of the 120V used in the United States. Therefore a 100W European bulb would be intended for use with a 220V potential difference. If you bring a 100W European bulb home to the United States, w..
A 115kg mail bag hangs by a vertical rope 3.5m long. Find the force needed to hold the bag in its new position
When the switch is opened the electromagnet does not instantly lose quite all of its magnetism. What effect does this have on the results
A 50 newton horizontal force pushes a 10kg mass sitting on a horizontal surface. What is the acceleration of the mass
If a 5-kg object experience a 10-n force for a 0.10-second, then what is momentum change of the object
An object travels halfway around a circle at a constant instantaneous speed v. What is the magnitude of its average velocity during this time interval
Inductive battery chargers, which allow transfer of electrical power without the need for exposed electrical contacts, are commonly used in appliances that need to be safely immersed in water, Find an expression for the emf induced in the secondary..
the green blockb has a mass of 7.00 kg and is moving to the left at a speed of 2.60ms. the red block a has a mass of
a square with sides of length 2m is perpendicular to a magnetic field of strength 10 t is rotated by 60 degrees in the
Two stereo speakers mounted 4.52 m apart on a wall emit identical sound waves. You are standing at the opposite wall of the room at a point directly among the two speakers. You walk 2.11 m parallel to the wall to a location where you first notice tha..
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