Saturday
May 25, 2013

Homework Help: college physics

Posted by Karrine on Saturday, December 15, 2012 at 8:11pm.

have a couple of questions about my homework and it's due at midnight tonight:

1. On a hot summer day, the temperature of air in Arizona reaches 115°F. What is the speed of sound in air at this temperature? (Enter your answer to four significant figures. The speed of sound at 0°C is 331 m/s. Use the conversion 0°C = 273 K as necessary.)
I changed F to K (got 315.928) and I plugged it in the appropiate equation:
331m/s(315.928/273)^(1/2) and I got 356.1. This is not right what do I do?

2.A dolphin located in sea water at a temperature of 25°C emits a sound directed toward the bottom of the ocean 105 m below. How much time passes before it hears an echo?
I did two different equations: dividing 105 by the temp in K, then I tried 331(298K/273 k)^(1/2) then I multiplied it by to (to denote that the sound had to return back) and got 0.607 but that wasnt right.

No one has answered this question yet.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

HRM240 - I have a paper due tonight be midnight is it possible to have someone ...
religion - Hello I need some help I have a paper due and I need to ask a pastor ...
Finance - can you help with a finance problem that is due tonight at midnight
physics - The solar wind is a thin, hot gas given off by the sun. Charged ...
classroom instruction - how will you teach and talk to students about the war? ...
physics - One afternoon, a couple walks three-fourths of the way around a ...
APA Format - Hi i have a couple of dumb questions :) I know the good websites ...
Music - I have a couple of questions... 1. I have to transpose a musical piece ...
English - 1. When is the due date of the report? It is on May 1st. 2. When is ...
Physics - One afternoon, a couple walks five-sixths of the way around a circular...

For Further Reading

Search
Members
Community