Recent content by neoking77

Homework Statement Addition of 2uL of 50mM NaCl to a 30 uL reaction gives a final NaCl concentration of ______ M. Homework Equations The Attempt at a Solution so because you add 2uL to 30uL, the dilution is (2 / 2+30) = 1/16 Then I multiplied the dilution with the concentration...

Hello all, I just want to confirm that I am on the right track for a certain question regarding dilution and concentration Q: Addition of 2uL of 50mM NaCl to a 30 uL reaction gives a final NaCl concentration of ______ M. Attempt: so because you add 2uL to 30uL, the dilution is (2 / 2+30)...

help any 1 ?

Homework Statement A 22-cm-long, 1.0-mm-diameter copper wire is joined smoothly to a 60-cm-long, 1.0-mm-diameter aluminum wire. The resulting wire is stretched with 20 N of tension between fixed supports 82 cm apart. The densities of copper and aluminum are 8920kg/m^3 and , 2700 kg/m^3...

Homework Statement The figure shows two masses hanging from a steel wire. The mass of the wire is 60.0 g. A wave pulse travels along the wire from point 1 to point 2 in 24.0 ms. What is mass m? Homework Equations v = sqrt(Ts/mu)The Attempt at a Solution T=mu*v^2 t = 0.024s d = 4m v = d/t =...

omgosh ... i got the equation wrong...lol it's fo /(1 +/- vs/v) my bad. thanks

Homework Statement A physics professor demonstrates the Doppler effect by tying a 600 Hz sound generator to a 1.0-m-long rope and whirling it around her head in a horizontal circle at 100 rpm. Homework Equations f =fo(1/ (V +/- Vsource/V)) The Attempt at a Solution T =...

Homework Statement Give the formula of a fluoride molecule that: is octahedral in shape is trigonal bypyramidal in shape is T-shaped ...etc The Attempt at a Solution Ok, I'm not really actually looking for an answer, because I already know the answers are SF6, PF5, and ClF3. And I have...

thanks a lot learningphysics and house md

all the solution is there, but i just don't understand the answer to part B. for part B, why is the sign negative?

now i get it! thanks so much! the ansr i got was a=-1/2 and b=1/2, which is in accordance with v = sqrt(T/mu)

by using exponents on both side, do u mean to raise m/s to the power of (a+b)(b-a)(-2b)??

sry forgot to say mu is mass per unit length of the wire

Homework Statement This is a question from my lab manual v=Cmu^aT^b (4.3) Use dimensional analysis of equation (4.3) to determine the exponents a and b. Homework Equations i know that the proper equation is v=sqrt(T/mu) The Attempt at a Solution I tried dimensional to get some...

thank you very much!