Another gas was used for many years to float transportation balloons.

which gas is it:

1) carbon dioxide
2) oxygen
3) hydrogen

why is this gas not used in balloons today?

Why is the structure of molecule important to its function?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

What energy conversion occurs when a sling shot is used to shoot a rock across the room? (2 points) question 2 options: 1) stored mechanical energy is converted to mechanical energy. 2) stored mechanical energy is converted to radiant energy. 3) gravitational energy is converted to radiant energy. 4) gravitational energy is converted to mechanical energy.