Recent content by grapejellypie

Homework Statement A wave source approaches you at constant speed and you measure a wave frequency f1. As the source passes and then recedes, you measure frequency f2. Find the expression for the frequency emitted if the source were stationary in terms of f1, f2, and wave speed v...

Homework Statement A wave source approaches you at constant speed and you measure a wave frequency f1. As the source passes and then recedes, you measure frequency f2. Find the expression for the frequency emitted if the source were stationary in terms of f1, f2, and wave speed v.Homework...

Homework Statement A 220lb fullback runs the 40-yd dash at a speed of 19.6 ± 0.1 mi/h. What is he de Broglie wavelength (in meters)? Homework Equations de Broglie Wavelength: λ=h/(mu), where λ=wavelength, h=6.626 x 10^(-34) kgm^2)/s, m=mass (kg), and u= speed The Attempt at a...

how do you incorporate the heat capacity of the vessel?

how do you account for the two separate systems combining into one? (i.e. how would you deal with the two different masses?)

Homework Statement A 505g piece of copper tubing is heated to 99.9 degrees C and placed in an insulated vessel containing 59.8g of water at 24.8 degrees C. Assuming no loss of water and a heat capacity for the vessel of 10.0 J/K, what is the final temperature of the system? (c of coppuer is...

For the second problem, you are going to have to know the molarity of oxygen, so that you can find the original amount of O2 (grams) in the 2.30 L of O2. After you know the grams of O2, you can figure out the "n." Then, use PV=nRT, to calculate the new "n." By subtracting the new "n" from the...

i've seen the two second derivatives equal to each other, but i never thought of manipulating the equation to move the variables to one side. thank you again for all of your help. i really appreciate it! so just to double-check...the answer would be y(x,t) =2/[(x-3t)^(4)+1] ?

thank you so much for all of your help! i really, really appreciate it! I'm sorry, but I have another question: why do you set f{xx}(x,t)-1/v^(2) * f{tt}(x,t) = 0?

would y(x-vt) be [2/(x^(4) +1)] - 3.0 cm?

what do you mean by fxx? is that the second derivative of x?

C6H12O6 (glucose) +6O2 ---> 6CO2 + 6H2O If this reaction is carried out in an expandable container at 35degrees C and 780 torr, what is the partial pressure of each gas when the reaction is 50% complete (9.0 g of glucose remains)? I know that 35 degrees C = 308.15k and that 780 torr =...

Displacement of Transverse Waves HELP! Homework Statement At time t=0, the displacement of a transverse wave pulse is described by y=2/(x^(4) +1), with both x and y in cm. Write an expression for the wavefunction as a function of position x and time t if it is propagating in the positive x...