Recent content by ncm2

Homework Statement Indicate how entropy of the system changes for each of the physical processes shown below. Entropy increases, entropy decreases, entropy does not change. 1. Purification 2. Mixing 3. Freezing 4. Evaporation 5. Separation Homework Equations Entropy...

I will try to explain the diagram for you, but it sounds like it probably will dim gradually. The diagram is a box, with a line through the middle, creating a figure 8 shape. Voltage source is on the left, which is connected in series to the light bulb which is on the top line, to the left...

Homework Statement Initially the switch is closed in the circuit shown and the light bulb is shining brightly. What happens when the switch is opened? (diagram in attached link) 1. The bulb goes out immediately. 2. The bulb gets gradually brighter. 3. The bulb gets gradually dimmer...

Thank you very much for the help. My only question, for question 1, why omit pie? The reason I kept it is because I viewed it as a constant, so I thought that constants carry over to the uncertainty value as well.

Homework Statement 1. A cylindrical can with radius of 3.1 +/- 0.4 cm and height 4.5 +/- 0.5 cm. What is the uncertainty in volume in cm cubed? 2. If theta= 0.40 +/- 0.02 radians, what is the uncertainty of y = tan (theta)? Homework Equations Volume of cylinder = Pie * r^2 * h...

Homework Statement Which solvent would be a better choice to dissolve each of the following? Tetracholride or Water a - thiamine hydrochloride b - CH3(CH2)16CO2H c - C6H12 d - CS2 e - NH3 f - (NH4)(CH3CO2) Homework Equations Draw the structure and find polarity Like...

Thanks for all your help. I used that website and my equation worked there, so maybe it is a problem with submitting the answer, I'm not sure.

I tried the change in units and the different resistivity of copper and they are both wrong. It is an online assignment, but I also have to hand it in for my work to be marked. Any other ideas? Also, is my thermal energy equation correct? E THermal=I^2*R Thanks for all your help.

For the .132m value, I got 0.0870 A. This is incorrect as is -.0870 A. I still don't know what I did wrong in my formula

Sorry that was a mistake in me writing it on here. I did calculate it with the proper .132m value, and tried positive and negative and it is still wrong, so something in my equation is wrong?

Homework Statement A 26.4 cm diameter coil consists of 23 turns of circular copper wire 1.90 mm in diameter. A uniform magnetic field, perpendicular to the plane of the coil, changes at a rate of 8.00E-3 T/s. Determine the current in the loop. Part Two: Determine the rate at which thermal...

I found: Li: .534 g/cm^3 Be: 1.85 g/cm^3 B: 2.34 g/cm^3 C: 2.267 g/cm^3 N: .00125 g/cm^3 O: .00149 g/cm^3 F: .001696 g/cm^3 Ne: .0008999 g/cm^3

Homework Statement Which of the elements, from the second period, has the highest density in its standard state? Homework Equations Standard state is gas at 1 atm, concentration of 1 M for liquid, or pure substance at 25C and 1 atm. The Attempt at a Solution I thought that N, O, F...

I am sure it is easy to do, but I just can't seem to figure the question out. It is 4 parts and I got the first 2 parts. If someone can give me the steps with the numbers (already handed in assignment, and got it incorrect), that would be much appreciated. 1. What is the magnitude of the...