Andre and Kayla ride their bikes from their home to school which is 8.4 kilometers away. It takes Andre 20 minutes to arrive at school and Kayla arrives 5 minutes after Andre. How much faster is Andre's average speed for the entire trip?

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

The pressure in a fluid is affected by which characteristics of that fluid

Choose all the answers that apply. ionic compounds dissolve easily in water do not dissolve in water have low melting points have high melting points conduct electricity when melted