3. A car travelling at 20. m/s stops in a distance of 40. m. What is its acceleration in m/s^2? (Please pay attention to direction and do not include
units in your answer.)

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

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this

Does current flow through or across a resistor?