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#1 Help Me ! » Physics !! » 2009-12-15 15:53:38
- sarabjot_anand
- Replies: 1
A standing wave is set up between two points creating waves in phase. The second order anti-node is determined to be 10 cm from one source and 15 cm from the other. The speed of the waves is measured to be 20 m/s. What is the frequency of the waves?
#2 Help Me ! » Physics » 2009-12-15 13:20:51
- sarabjot_anand
- Replies: 1
The wavelength for sound in air is 6.8% of what it is in steel. Its speed in air is 344 m/s. A person uses a hammer to strike the end of a steel fence which is 84 m long. This produces a note with a frequency of 3500 Hz [in the air and in the steel]. How long does it take for the sound to travel the length of the fence.
a) through the air
b) through the steel
#3 Help Me ! » Physics » 2009-12-15 13:16:11
- sarabjot_anand
- Replies: 1
A note from a piano travels at 350 m/s with a wavelength of 15 cm. How many wavelengths are produced in the time it takes the note to travel 65m?
#4 Re: Help Me ! » Advance Functions - Grd 12 . Trig » 2009-12-08 16:41:48
ahah thanks 
#5 Help Me ! » Advance Functions - Grd 12 . Trig » 2009-12-08 15:05:34
- sarabjot_anand
- Replies: 2
Factor the expression 81 16sin^2(theta)
#6 Re: Help Me ! » Math - Advance Functions - Trignometry » 2009-12-08 12:51:11
Which of the following is not a primary trigonometric ratio of 2pi/3?
1. 2/(sqt 3)
2. -1/2
3. (sqt3)
4. (sqt3)/2
P.s ... sqt = square root
#7 Help Me ! » Math - Advance Functions - Trignometry » 2009-12-08 12:41:33
- sarabjot_anand
- Replies: 5
If an object travels in a circle (32pi/5) radians, at what degree measure is it, relative to where it started?
a. 1052 degrees
b. 144 degrees
c. 72 degrees
d. 60 degrees
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