A helium balloon has a volume of 23.6 L when the pressure is 1.289 atm and the temperature is 16 ◦C. The balloon is cooled at
a constant pressure until the temperature is
−10◦C. What is the volume of the balloon at
this stage?
Answer in units of L.

Identify the electromagnets with poles that are reversed from the electromagnet shown above

How do dying stars contribute to the formation of planets

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.