Recent content by smillphysics

A harp from the middle ages produces a low A with a frequency of 200 Hz. What is the frequency of G on the same harp 3 octaves up? frequency=2^(m/12)*frequency SO 2^(m/12)*200Hz, I decided that m=9 and for each increase in an octave I though that you were supposed to mutliply 12 so...

It says I have two negative and two positive. I think your post implied that I only have 3 charges instead of 4.

There are four charges, each with a magnitude of 1.98 μC. Two are positive and two are negative. The charges are fixed to the corners of a 0.288-m square, one to a corner, in such a way that the net force on any charge is directed toward the center of the square. Calculate the magnitude of the...

I actually can't find the velocity of sound is sea water. The problem only gives the information listed above. Any other suggestions on how to solve this problem?

A sonar generator on a ship produces periodic ultrasonic waves at a frequency of 2.3 MHz. The wavelength of the waves in sea water is 4.9 · 10-4 m. When the generator is directed downward, an echo is received 16.2 s later. How deep is the ocean in m? Frequency=1/T Velocity=wavelength/T=...

What happens to the period when you cut the radius in half for a centripetal acceleration problem? a=V^2/r T=2pi*r/v I need some background on this question. I believe the answer is the period is decreased by a factor of 2. I am just slightly confused.

You bought two kilograms of ice at -10 degrees celcius for your cooler when a friend suggests to instead use two kilograms of wood at -10 degrees celsius. Why should you stick with your ice? Thermal Conductivities Latent Heats Specific Heats Answer with either Good Reason, True but Irrelevant...

I've used the same pressure at both points. I still don't know where I have gone wrong?

Any help on this would be great- I can't seem to find the correct y1 to use.

What is the height at the top? I then tried to put .45-.2=.25 and used that as the height at the top but that is also incorrect.

A siphon tube is filled with gasoline and closed at each end. One end is inserted into a gasoline tank 0.20 m below the surface of the gasoline. The outlet is placed outside the tank at a distance 0.45 m below the surface of the gasoline. The tube has an inner cross-sectional area of 3.8 × 10-4...

Thanks- that was why I was incorrect.

A syringe with a plunger of diameter 2 cm is attached to a hypodermic needle with a diameter of 2.1 mm. What minimum force (in N) must be applied to the plunger to inject into a vein where the pressure is 16 torr above atmospheric pressure. P=F/A since P will be constant throughout...

I figured this problem out. Thank you!

So I plugged in A (.35m) into the equation, x=.35sin(1.34*3.854) and got x=.032 which is still incorrect? Any help on where I am going wrong? The second part of this problem calls for the maximum acceleration- would I use the equation a=omega^2cos omega *t? I don't think that I will get this...