Lead shot is heavier
Yes, Steel is a harder metal than Silver. :)
no a skeleton is stronger than steel so it ways more.
The best kettlebell brand to buy as a gift would be the Jillian Michaels kettlebells, that is if you are willing to pay good money. If you want a cheaper gift, try the Kathy Smith kettlebell (both, which are equally great gifts).
Because they each weigh 300 pounds, they weigh the same, thus neither is heavier than the other.
Yes CFC's are much heavier than air. If you filled a balloon with CFC's, it would drop, not float away.
You can continue with the kettlebell, but I would look into specifically how. There is a video entitled Baby Bells: The Fit Pregnancy Workout It is a fitness program designed specifically for pregnant women. It gives women the option of using the kettlebell when working out.
A kettlebell seems like a great idea for someone who wants to lose weight. You can find out more information about them by going here en.wikipedia.org/wiki/Kettlebell. Another good option would be to buy a pilates ball.
I would not recommend the kettlebell workout if you are trying to improve your conditioning. You should probably just get a treadmill or elliptical machine if you want to improve conditioning.
Of course, Gofit-Premium-Kettlebell-20-lb is appropriate for elder teenagers.
3mm thickness of stainless steel tank. 3mm thickness of stainless steel tank.
That would depend on the wall thickness everything being equal cast is heavier
No, heavier by the weight of the extra air put inside it. Even if you filled the tire with helium it is still heavier, although the additional weight would be less than the additional weight of air.