Convert the density of 4.42 x 10^ -2 g/cm^ 3 to Kg/m^3 a. 0.42 Kg/m^3
b. 4.42 x 10^1 Kg/m^3
c. 4.42
d. 4.42 x 10^ -3 Kg/m^3

An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45∘. what percentage of the initial intensity is transmitted by the system?

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

Adiver named jacques observes a bubble of air rising from the bottom of a lake (where the absolute pressure is 3.50 atm) to the surface (where the pressure is 1.00 atm). the temperature at the bottom is 4.00 ∘c, and the temperature at the surface is 23.0 ∘c. what is the ratio of the volume of the bubble as it reaches the surface (vs) to its volume at the bottom (vb)? if jaques were to hold his breath the air in his lungs would be kept at a constant temperature. would it be safe for jacques to hold his breath while ascending from the bottom of the lake to the surface?