Recent content by momopeaches

So, to make this work, would my E2 equation have to be E=9*10^9(q/-r^2)? I don't know what you mean when you say E1 and E2 are in the same direction.

Homework Statement A + 7.3 nC point charge and a - 2.4 nC point charge are 3.5 cm apart. What is the electric field strength at the midpoint between the two charges? Homework Equations E = 9*10^9(q/r^2) q = charge r = distance from point charge The Attempt at a Solution Since...

Ah, thank you! I got it now. I was assuming 343 m/s for the velocity. Should I not assume, unless the problem explicitly says "through air"?

Homework Statement A 120-cm-long, 3.0 g string oscillates in its n = 4 mode with a frequency of 150 Hz and a maximum amplitude of 5.5 mm. Wavelength is 0.6 m. What is the tension in the string? Homework Equations f = sqrt(TL/m)/2L The Attempt at a Solution 150 =...

Since I didn't do the experiment and was just given the data, its hard for me to say what the method used for the experiment were. In past labs, my group has usually been able to have a less than 5% error. The instructor wants us to explain who we may have gotten a high percent error, but...

Homework Statement For my physics lab, we have to calculate the speed of sound through steel and aluminum based on an experiment we did using a microphone and a program called Logger Pro. The resulting graphs gave the frequency of the sound of the aluminum rod as 2109.38 Hz, and the frequency...