In which of the following pairs do both numbers contain the same number or significant figures 0.00575g and 5.75 x 10^-3g 405k and 405.0k 150000s and 1.50 x 10^4 3.8 x 10^-2L and 3.80 x 10^5 L

Asmall amount of a solid is added to water. the observation made after fifteen minutes is shown in the figure. which of these solids has been probably added to water? a) oil b) sand c) sugar d) wood chips

Why do cells appear different in distilled water than they do in 10% salt water?

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.