Recent content by bharp24

my TA helped me in class, and even he said he is not sure if this was the right way to go about it, but this is what we did: antinode occurs at wavelength/2 we assigned a variable to the different distances the piston is from knowing the frequency we found the velocity by f/wavelength...

Homework Statement A long tube contains air at a pressure of 1.00 atm and a temperature of 77.0 degrees celsius. The tube is open at one end and closed at the other by a movable piston. A tuning fork near the open end is vibrating with a frequency of 500 Hz. Resonance is produced when the...

I am still stuggling. I see that from the equation H = kA(Th-Tc)/L, i can say that H is equal to dQ/dt, which is the rate of the heat current. I took this information and applied my .25 celsius degrees to the equation. .25/(kA) = (Th-Tc)/L ---the temp. gradient This is wrong though, what...

please... i cannot find any help on this question so far! Homework Statement A rod is initially at a uniform temperature of 0 ^deg C throughout. One end is kept at 0 ^deg C, and the other is brought into contact with a steam bath at 100 ^deg C. The surface of the rod is insulated so that heat...

thanks! i figured it out a little bit ago though!

i tried it again and got it right. thanks for trying to help me out!

pendulum problem--last answer was wrong..need help please! A small rock with mass 0.12 is fastened to a massless string with length 0.80 to form a pendulum. The pendulum is swinging so as to make a maximum angle of 45 with the vertical. Air resistance is negligible. What is the speed of the...

i think i went ahead and added a friction force into the first 2, which zeros them out. i still get a wrong answer though when I leave the friction out. any suggestions on how to complete this problem?

Two blocks are connected by a very light string passing over a massless and frictionless pulley. The 20.0N block moves 75.0cm to the right and the 12.0N block moves 75.0cm downward. Find the total work done on 20.0N block if there is no friction between the table and the 20.0N block...

that is what i meant..sorry. i still need to know what the equation would be though to figure out when it is tangent to the yz plane.

what i have so far is (x-3)^2 + (x+1)^2 + (x+2)^2= r^2. i just need to find the radius of this equation, so that the sphere will be tangent to the yz plane. once i know the coordinates to use for the tangent point, i can use the distance formula to give me the radius.

I need someone to help me! i have been given a center point of (3,-1,-2) of a sphere and i need to get an equation for when it is tangent to the a) the yz plane b) y=7. i know i need to use the distance formuala to attain the radius, but i am majorly confusing myself in what coordinate to pick...

it will = 1 because the sin and cos of 45 degrees are the same...right?

i have been given that vector r = bt^2i + ct^3j where b and c are positive constants, and i need to know when the velocity vector will make an angle of 45 degrees. i have been trying to figure it out and am just confused. i have taken the derivative of vec r, because i know that it becomes...