You don't have any matches, so you want to focus sunlight to ignite a pile of twigs for a campfire. which mirror would be best to use? a. convex mirror b. concave mirror c. flat mirror d. plane mirror

Bone-strengthening physical activity done increases bone-mineral content and bone density in youth.

The freezing and boiling point of a substance changes as the air pressure around it changes. for example, at a lower air pressure (higher altitude) it is easier for water molecules to escape from liquid into the air. in a high altitude city such as denver, colorado compared to a sea-level city such as houston, texas, water

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig