Your science teacher hands you a small container filled with an unknown liquid substance. he asks you to measure the mass of the liquid. what lab equipment will you use and how will you calculate the mass of just the liquid? be sure to describe the process you would follow step-by-step.

In a system, when potential energy decreases, then entropy also decreases. true false

Ineed the answer to question 1 , i’m desperate

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.