Questions with the keyword 'property'

• What are radar pulses? Are they like waves? Would they harm humans? Why do they come straight back? by Zealousy to Chris Comments: (No comments so far )
• Why do different metals produce a different flame when burning? e.g why does copper have a green flame? by Zealousy to Rob Comments: (No comments so far )
• Would it ever be possible to create an entirely frictionless material? by Zealousy to Rob Comments: (No comments so far )