Answer:
good, old days
Explanation:
Since we need a comma between adjectives:
good, old days
Answer:
a ballooon filled with helium if sealed properly
Explanation:
balloons filled with helium will get stuck in the atmosphere
Answer:
I don't really know but I wish I could help you
Answer:
Uniform velocity means velocity say the same throughout the time period, there is no acceleration, while variable velocity means velocity can and probably does change, there will be some type of acceleration
Explanation: