Write any 4 precaution to be taken during lighting?

True or false graphs must include scales that increase by the same amount

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

Two solutions of the same uv-absorbing molecule were analyzed by uv-vis spectroscopy on the same instrument using 1 cm pathlength cells. use data from the table to calculate by what percentage the concentration of solution b is compared to that of solution a.sample absorbance at 315nm a 0.45 b 0.80