Calculate the volume of 19 kilograms of petrol if the density of petrol is 800 kg/m?

Gunpowder residue is most likely to show up where on a shooters hands

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f