Help Steam machines are used to sterilise kitchen work surfaces.
Calculate the energy needed to change 60 g of water into steam.
The latent heat of vaporisation for water is 2.26106 J/kg.
Use the correct equation from the Physics Equations Sheet.

How does convection affect our atmosphere? our layers of earth? our oceans?

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

The earth is constantly spinning on its axis, like you might spin a basketball on your finger. it is this spinning of the earth that causes