Need looking for the half life at 37°c

If a planet rotates 360 degrees during a 24 hour time period, what does that tell us about the planet? a. the middle of the planet is in darkness b. the seasons on the planet vary every day. c. the planet runs on a 12-hour time clock. d. the temperature on the planet varies daily.

2. how is heavy water different from normal water

What is the percentage of hydrogen in nitrogen trihydride