Source emits sound equally in all directions
A source emits sound equally in all directions. There are no reflections of the sound. At a distance r1 from the source the sound is around 3.9 dB louder than it is at a distance r2 from the source. Find out the ratio r1/r2?
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An instant lottery game offers you probability 0.01 of winning on any one play. Plays are independent of each other. If you play three times, the probability that you win on none of your plays is regarding
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A rock having mass m is dropped from a height h above the ground. Employ the conservation of energy to determine (in terms of m and h) the given. i) Determine the kinetic energy of the rock merely before it strikes the ground.
A rapid test for the presence in the blood of antibodies to HIV, the virus that causes AIDS, gives a positive result with probability about 0.004 when a person who is free of HIV antibodies is tested. A clinic tests 1000 people who are all free of
If the acetic acid content of vinegar is determined as1.00mol/L, what weight of acetic acid would there be in 1.00 liter of vinegar solution?
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An electron having kinetic energy 5.5 keV moves in the circular orbit perpendicular to a magnetic field of around 0.390 T. (i) Determine the radius of the orbit.
Discuss how long will it take hydrogen chloride to effuse down an identical capillary tube at the same conditions of pressure and temperature? It takes 32.0 seconds for ammonia to effuse down a capillary tube.
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