Swapnil checks his heart rate to see if he is working hard enough to qualify for a "vigorous intensity" workout according to the CDC. Which heart rate reading will let him know that he has reached this goal? A.

50 percent of his maximum heart rate

B.

60 percent of his maximum heart rate

C.

70 percent of his maximum heart rate

D.

80 percent of his maximum heart rate

Air flows upward in the wick of a lantern because of the liquid property called

How do you tell if someone actually cares about you? and just say they do?

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.