stairwaytozeppelin5150

If a steam engine takes in 2.765 × 104 kJ from the boiler and gives up 1.917 × 104 kJ in exhaust during one cycle, what is the engine’s efficiency?

A system’s initial internal energy is 22 J. Then heat is added to the system.

If the final internal energy is 34 J and the system does 24 J of work, how much heat is added to the system?

Answer in units of J

A toy balloon is inflated with helium at a con- stant pressure that is 9.8 × 105 Pa in excess of atmospheric pressure.

If the balloon inflates from a volume of 0.00084 m3 to 0.00123 m3 , how much work is done by the balloon on the surrounding air? Atmospheric pressure is 1.01 × 105 Pa .

Answer in units of J

A 0.013 kg cube of ice at 0.0◦C is added to 0.422 kg of soup at 80.5◦C. Assuming that the soup has the same

specific heat capacity as water, find the final temperature of the soup after the ice has melted. The specific heat of water is 4186 J/kg ·◦ C and water’s latent heat of fu- sion is 3.33 × 105 J/kg.

Answer in units of ◦C

An 1100 kg car traveling to the east is slowed down uniformly from an initial velocity of 55 m/s by an 8000 N braking force acting opposite the cars motion. What is the car's velocity after 3.1 seconds?

A boy on a 2.3 kg skateboard initially at rest tosses a(n) 8.0 kg jug of water in the forward direction.

If the jug has a speed of 2.6 m/s relative to the ground and the boy and skateboard move in the opposite direction at 0.62 m/s, find the boy’s mass.

Answer in units of kg

http://www.youtube.com/watch?v=UcxKtOpW08M

Like a splitter, but in reverse.

My speakers connected to my windows vista don't work. I"m not at all savvy as far as these things go, so I need serious help. I know they worked for the longest time, and all of a sudden, by the sound icon in the bottom right corner, there's a red x; not the one for it muted, but something else. It says there is no audio output device installed...

Everything is connected, as far as I can see, and I'm relatively certain everything's installed... what are some things I can do to fix this?

When I plug my bass into the amp, I get a very strong hiss and buzzing noise, as loud as when you are in a car and the window's open. When I play a note, I get a rapid popping noise, rather than a note. My cord's absolutely fine, the input jack on the bass is tightly screwed on, and the amp works perfectly with my friend's bass. What do I need to do to fix this?

I AM willing to pay, if it's reasonable. I've scourged the internet and haven't found any sheet music for the fabulous rendition of Stairway by the London Philharmonic Orchestra. Just wondering if any exists and where to find it?

We play a mix of Led Zeppelin and Van halen, with some soft stuff mixed in. We'd like a name that has to do something without outer space.

We play a style similar to Led Zeppelin and Van Halen. I'm thinking of something with 1 or two words, and nothing corny please :)

Hey, I have a Spider line 6, have a little problem with it. The jack on the amp, the place where the cord goes into the amp... there's nothing there. It's just a hole, and I suspect that the jack itself has gone inside the amp. Anybody know how I can fix this/get it out?

Here's a video with details and picture.

http://www.youtube.com/watch?v=DazUj6jGzCM

Always wondered that -.-

I need a little bit more power with my roland cube, I was wondering if an amp head could boost it up.

If it helps, I use a Spider Line 6, 75 watt guitar amplifier. The guitar jack is the place where you plug the guitar into the amp. The circular thing that insert the chord into has fallen inside the amp though, how can I get it out?

I am aware that, after distilling one substance, if you leave a tube in the collection container holding that substance, the substance will be sucked back into the original substance. Why does that occur?

I use a 100 watt Spider Line 6 guitar amp. I'm wondering what sort of cable it'll take to plug my Ipod Touch into the amp so I can blast it.