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
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...
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...
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...