Sunday
December 8, 2013

# Posts by Melissa

Total # Posts: 1,058

physics
The first resonant length of a closed air column occurs when the length is 30.0cm . What will the second and third resonant lengths be

physics
The third resonant length of a closed air column is 75cm . What is the first and second length

physics
A car sounds its horn (502 Hz) as it approachs a pedestrian by the side of the road. The pedestrian has perfect pitch and determines that the sound from the horn has a frequency of 520 Hz. If the speed of sound that day was 340 m/s , how fast was the car travelling

physics
Assuming that the speed of sound at a certain altitude is 330m/s calculate the speed of an airplane that is travelling at (A) mach 0.70

physics
A ship is traveling in fog parallel to a dangerous , cliff-lined shore. The boat whistle is sounded and its echo is heard clearly 11.0 s later. If the air temperature is 10.0 c , how far is the ship from the cliff.

physics
Calculate the speed of sound wave in air if its frequencies and wavelengths are 256Hz and 1.32m

health
According to the AMA, what is the key reason behind a physicians duty of confidentiality to a patient? Thanks in advance!!!

statistics
Given a level of confidence of 99% & a population standard deviation of 10, answer the following: (A)What other information is necessary to find the sample size (n)? (B)Find the Maximum Error of Estimate (E) if n=77. show all work.

Chemistry
Calculate the mass of silver bromide produced from 22.5 g of silver nitrate in the following rxn: 2AgNO3(aq) + MgBr2(aq)-->2AgBr(s)+ Mg(NO3)2 (aq)

Math
The present value of the money in your savings acct is \$420, and you're receiving 3% annual interest compounded monthly. What is the future value in 2 months?

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