Physics question need help , kinda stuck?

If a car engine burns an equivalent of 20,000 joules of energy and attains a kinetic energy of 5,000 J, how much energy is dissipated in the form of heat?

Is bahamasun.com a scam?

I just came accross a sight called bahamasun.com and the prices are too good to be true. My friends and I are college students looking to go on a cruise this spring break. I came across this website that just seems too good to be true. Anyone have any experience with this company or know anything about it?

I had a neg pg test, but have symptoms and a positive lh surge for four days is the pg test wrong?

My hubby and I recently had my mirena (iud) removed fri june 10th and have been using ovulation predictors, they have been positive for four days now but were negative before then. Ive had some cramping, half day of light spotting, afternoon nasea and increased tiredness but when we took a pg test it was neg. Is it possible that Im pregant even tho the test was neg? Or am I thinking about it too much so my body is some how creating my symptoms? We have an older son and my doc says im healthy.

1999 Camaro 3.8 V6 performance camshaft question.?

I am wanting to go from stock camshaft to a higher performance one, i know i will need new springs but what else? and will my computer be able to handle it?

Stomach cramps/upset stomach & dizzy spells?

I've been off my period for a few days now and I've been having off and on stomach cramps and an upset stomach. I also randomly get dizzy spells and feel cold and clammy or I randomly feel like throwing up. I've been on depo since January of this year and I had a baby in Nov 2010. I got pregnant with him on the IUD so is it possible that depo isn't working and I could be pregnant again?!?! Someone please help! If I'm not pregnant than I don't know what's wrong with me.

Why should welfare recipients be required to be on birth control?

I was reading an article on world of wealth where the ideas of birth control for those recieving governmet entitlements should have a IUD or get a vasectomy(men). I get the idea, but how well would that work. Wouldn't it be better to require them to join the military or marry someone with a wonderful income. Why is it always birth control? I am not against, just curious. Is it this bad?

I put lowering springs on my car about 6 months ago and wanna go lower...?

i intend on buying a full coilover set to lower my car 4 inches. but i have heard that if i heat up my lowering springs with a little propane torch it will lower it by weight of the car, is this true? if so could i do it and keep them on for a couple weeks before i put my coilovers on without worring about any major problem?