Recent content by sphouxay

Homework Statement A 2.0--cm tall object is placed in front of a mirror. A 1.0--cm tall upright image is formed behind the mirror, 165 cm from the object. What is the focal length of the mirror? Homework Equations The Attempt at a Solution I tried 37 cm, it was incorrect

Homework Statement An object is 12 cm in front of a concave mirror with a focal length of 21 cm . Locate the image in s' Is the image upright or inverted? Homework Equations willl get back with it The Attempt at a Solution Im not sure where to start, this should be a simple...

Homework Statement A flutist assembles her flute in a room where the speed of sound is 340 m/s. When she plays the note A, it is in perfect tune with a 440 Hz tuning fork. After a few minutes, the air inside her flute has warmed to where the speed of sound is 347 . How many beats per...

Homework Statement The physics of wind instruments is based on the concept of standing waves. When the player blows into the mouthpiece, the column of air inside the instrument vibrates, and standing waves are produced. Although the acoustics of wind instruments is complicated, a simple...

Homework Statement Learning Goal: To understand standing waves, including calculation of and , and to learn the physical meaning behind some musical terms. The columns in the figure (Intro 1 figure) show the instantaneous shape of a vibrating guitar string drawn every 1 . The guitar...

Homework Statement The wave speed on a string is 155 m/s when the tension is 84.0 N. What tension will give a speed of 182 m/s? Homework Equations velocity= Squareroot(tension/linear density) linear density = mass/length The Attempt at a Solution Well, what I did was...

I did use 10 degree celsius which would be 273 + 10 (Conversion from celsius to kelvins) and I received 338.28. If my final answer is 4.2285 what am I converting that to to get my m and s^-1

Yeah, thanks guys the wavelength would double but the speed remains unchanged. That was a duh moment for me. It was just a matter of finding the right equation (speed= wavelength/period) and plugging numbers and formulating. Thanks to everyone who helped me out. I've got more to come some please...

the speed of sound in air at 20 degree celsiusis is 343 m/s, my calculation with the ideal gas law is 338.28 is that correct? And for the frequency wouldn't I just have to divide the velocity of 338.28 by 80 khz. Is that even close 4.2285

Homework Statement Find the period T for a wave of wavelength (lambda) . Express the period in terms of pi, lambda , and g. Homework Equations T = lambda/velocity, lambda = velocity/frequency T= 1/frequency k (wave number) = 2pi/lambda V = Squareroot of (g/k) The Attempt at a...

Homework Statement Bats are mainly active at night. They have several senses that they use to find their way about, locate prey, avoid obstacles, and "see" in the dark. Besides the usual sense of vision, bats are able to emit high-frequency sound waves and hear the echo that bounces back...

Doh, i just needed some basic math for that one thanks for the help, what's the equation for the amplitude using wavelength and wave speed, any ideas?

so are you saying the amplitude is 0.690/2, which is .345 meters

Homework Statement A fisherman notices that his boat is moving up and down periodically, owing to waves on the surface of the water. It takes a time of 3.00 second for the boat to travel from its highest point to its lowest, a total distance of 0.690 meter . The fisherman sees that the...

Homework Statement If the amplitude of the oscillator doubles, what happens to the wavelength and wave speed? The wavelength doubles but the wave speed is unchanged. The wavelength is unchanged but the wave speed doubles. Both wavelength and wave speed are unchanged...