How many times does the diaphragm move back and forth
A loundspeaker diaphragm is producing a sound for 2.1 s by moving back and forth in a simple harmonic motion. The angular frequency of the motion is 8.44 104 rad/s. How many times does the diaphragm move back and forth?
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(a) At what spot along a line through the charges is the net electric field zero? Give the distance of the spot to the positive charge in meters (m). (Hint: The spot does not necessarily lie between the two charges.) (b) What would be the force on
A diver springs upward with an initial speed of 1.9 m/s from a 2.5 m board. (a) Find the velocity with which he strikes the water.
What is the value of delta G at 727oC at727oC.(b) In what direction will a net change occur ifone brings together 0.0500mol CO2,0.0700molH2, 0.0400mol CO, and 0.0850 mol H2O?
What is the potential difference between the two conductors? Assume that the region between the conductors is air.
When a 2.3L sample of hydrogen gas at 25oCis heated to 120oC at constant pressure, what is the new volume of the gas? What is the pressure of a sample of 35g of nitrogen gas in a5.6L container at 90oC?
An exercise machine indicates that you have worked off 2.5 Calories in a minute-and-a-half of running in place. What was your power output during the time? Give your answer in both watts and horsepower.
A piece of metal of mass 12 g at 107 ?C is placed in a calorimeter containing 55.7 g of water at 20?C. The final temperature of the mixture is 27.6?C. What is the specific heat capacity of the metal?
Build a 90% confidence interval for the population standard deviation for all cans that come off the assembly line.
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