Questions with the keyword 'material'

• what type of metal is a rocket made of? by 8P form and 1 other. to Anne, Beth, COLFlight, Jon, Tom Comments: (No comments so far )
• the law of conservation of energy clearly staes “energy cannot be created or destroyed”, but during the big bang it by Sheldon Cooper to Anne, Beth, COLFlight, Jon, Tom Comments: (So far, one comment )