Why is a mirror that is cleaned with an alcohol solution slightly colder right after it is clean. Can anyone explain why?

Tarzan swings back and forth on a long vine with a period of 7.27 s. how long is the vine? (unit=m)

Which equations are balanced? Check all that apply. Mg3N2 + H2O → 3MgO + 2NH3 C3H8 + 5O2 → 4H2O + 3CO2 Zn + 2HCl → ZnCl2 + H2 3Ca (OH) 2 + 2H3PO4 → Ca3 (PO4) 2 + 6H2O 3H2SO4 + 2Fe → Fe2 (SO4) 3 + H2 4Al + 3O2 → 2Al2O3

The toxic effects of water pollution are generally

What is the momentum if you have a ball with the mass of 0.5 kg and velocity of 10 m/s?

What increases the amount of light that bends passing through a lens a. greater curve b. smaller curve c. thicker edge d. thicker center

A train moves at constant velocity of 50km/h. how far will it move in 0.5h?

Which process best describes part of a scientific investigation? O designing a solution O evaluating the conclusion O evaluating the solution O identifying the conclusion

How many neutrons are in Cesium-130

You are standing outside during the daytime. How can you see a blade of grass? A. Light is produced by your eyes and travels out to the grass. B. Light is produced by the grass and travels straight to your eyes. C.

Are cosmic rays and gamma rays invisible or do they have color?