Recent content by pstir2

So you're saying the mathematical solution to the entire question would be: a) λn=4L/(2n-1) λ1=4x0.136/(2x1-1) λ1=0.544 L=3/4λ L=3/4 x 0.544 L=0.408m b) fn=nv/4L f1=(1 x v) /(4 x 0.136) 625=v/0.544 v=340m/s vT=331√(T/273+1) 340 = 331√(T/273+1) ... T = answer

So what does the "n" in that formula stand for?

I thought that the formula that I used first in part A would take the available length of the pipe L = 0.136m and work out the length of it required to get a full wavelength. I then worked out 3/4 of a wavelength to find the length of pipe extended out of the water to get the third harmonic (I'm...

So you're saying my answer to part A is correct?

Homework Statement Before I write the question you should know that my maths is all correct in my solution but I must have used the formulas incorrectly (or used the wrong formulas). I can't pinpoint where I've gone wrong or if I have left a formula out (I'm a teacher solving this question for...

Homework Statement In terms of the energy involved (using formulas provided), explain why accelerating a spacecraft to the speed of light is impossible. Homework Equations time, mass and length dilation formulas, and a few astrophysics formulas, E = Ek + mc2, projectile motion formulas The...

Homework Statement A muon is a subatomic particle with an average lifetime of 2.2 microseconds when stationary. In a burst of cosmic rays in the upper atmosphere, muons are observed to have a lifetime of 16 microseconds. What speed are they traveling at to achieve this? Homework Equations Time...

Homework Statement Two identical point charges, q1 = +2.5 x 10-6 C and q2 = +2.5 x 10-6 C, are placed as shown in the diagram below. Point P is a distance 0.05 m from q1 and 0.12 m from q2, such that the angle at P is 90 degrees. Calculate the magnitude of the Electric field E at point P...

Homework Statement Two identical point charges, q1 = +2.5 x 10-6 C and q2 = +2.5 x 10-6 C, are placed as shown in the diagram below. Point P is a distance 0.05 m from q1 and 0.12 m from q2, such that the angle at P is 90 degrees. Calculate the magnitude of the Electric field E at point...

Homework Statement Two identical point charges, q1 = +2.5 x 10-6 C and q2 = +2.5 x 10-6 C, are placed as shown in the diagram below. Point P is a distance 0.05 m from q1 and 0.12 m from q2, such that the angle at P is 90 degrees. Calculate the magnitude of the Electric field E at point P...

The total is what I calculated the voltage source to be but I'm not sure its correct.

Because the voltage drop though resistors R6(20ohms) and R7(10ohms) causes a total voltage drop of 30V any parallel circuits to it will also have a voltage drop of 30 V. therefore R5(15ohms) must have a voltage drop of 30V.

Because the voltage drop though resistors R6(20ohms) and R7(10ohms) causes a total voltage drop of 30V any parallel circuits to it will also have a voltage drop of 30 V. therefore R5(15ohms) must have a voltage drop of 30V.

That's all the information that I have. This isn't a practical question for my house, car, etc. Its a question to go on a yr 11 Physics exam that I'm writing.

Homework Statement Solve for all voltage drops and currents at the resistors and battery Homework Equations V=IR RT=R1+R2+...+Rn 1/RT=1/R1+1/R2+...+1/Rn IT=I1+I2+...+In The Attempt at a Solution I just wanted to check if my solution is correct...