Recent content by ariana0923

http://imageshack.us/photo/my-images/829/sipodpre.jpg/ I think it is mold, but not sure. It was a swab of an iPod... Thanks for any input or hints on how to tell what it is!

...that confused me because I thought the mass DIDN'T make a difference?

So, I was playing around with this virtual lab online. I could add light gas or heavy gas to try to make the piston move. I got the same results using both gases..in other words, it took the same amount of light gas to move the piston as it did using heavy gas. Why is that? One would think it...

Homework Statement A bullet with a mass of 6.00 g is fired through a 1.25 kg block of wood on a frictionless surface. The initial speed of the bullet is 896 m/s, and the speed of the bullet after it exits the block is 435 m/s. At what speed does the block move after the bullet passes through...

Homework Statement A 0.10 kg piece of copper at an initial temperature of 95°C is dropped into 0.20 kg of water contained in a 0.28 kg aluminum calorimeter. The water and calorimeter are initially at 15°C. What is the final temperature of the system when it reaches equilibrium? M(w) = 0.20kg...

Homework Statement An electrical power plant manages to transfer 88 percent of the heat produced in the burning of fossil fuel to convert water to steam. Of the heat carried by the steam, 40 percent is converted to the mechanical energy of the spinning turbine. Which best describes the...

Homework Statement Over several cycles, a refrigerator does 1.51 x 10^4 J of work on the refrigerant. The refrigerant in turn removes 7.55 x 10^4 J as heat from the air inside the refrigerator. a. how much energy is transferred as heat to the outside air? b. what is the net change in the...

Ok, thanks, yeah that makes sense.

Ahh thank you...I'm not going crazy then! You have no idea how many erroneous questions I've come across (I'm at an online school--biggest mistake ever). I will report this as yet another error...thanks again.

http://i42.tinypic.com/97vehc.jpg ^It's all in there. Thanks in advance =]

Why is it that the object with the heavier mass influences the final temperature (once the two objects in contact have achieved thermal equilibrium)? For ex. a copper block (4 kg) at 0 degrees and an aluminum block (1 kg) at 100 degrees...in this case, the final temp ends up lower (36 ish...

(This is not a homework question...it's a theoretical question based on an experiment that was conducted.) If you have an aluminum block and a copper block of equal mass, but the copper block is 100 degrees C and the alum. block is 0 degrees C, they reach roughly 30 degrees C at thermal...

That can't be though...I wrote everything the problem said. Plus, this section does not cover grav. potential energy, so it cannot be in the problem (the next section talks about it).

Homework Statement A 2.1 x 10^3 kg car starts from rest at the top of a driveway that's sloped at an angle of 20.0 degrees with the horizontal. An avg. friction force of 4.0 x 10^3 impedes the cars motion so that the cars speed at the bottom of the driveway is 3.8m/s. What is the length of...

My problem is with this lab on friction...it is a virtual lab, as I attend a virtual high school. I've put in numerous hours and can't seem to figure out what is wrong. You see, we need to determine max static friction and kinetic friction using this program. For all the objects EXCEPT the dog...