If a laboratory fire erupts, immediately is it A. Notify your instructor. B. Run for the fire extinguisher or C. Throw water on the fire. D. Open the windows.

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.