Cheryl has a mug that she says is made up of matter. Heather says that the hot chocolate inside the cup is made up of matter, too. Keaton says that the steam coming from the cup is also made up of matter. Mikayla says that none of it is matter because matter is too small to see. Which best describes who is correct? Cheryl Cheryl, Heather, and Keaton Cheryl and Heather Mikayla

What is work? how much work is done to move an object 0 meters?

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.

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination. at the turning point, how far is the second student from the destination?