Which of the following is always irrational? o the sum of two fractions
o the product of a fraction and a repeating decimal
O the sum of a terminating decimal and the square root of a perfect square
the product of a repeating decimal and the square root of a non-perfect square

While standing outdoors one evening, you are exposed to the following four types of electromagnetic radiation: yellow light from a sodium street lamp, radio waves from an am radio station, radio waves from an fm radio station, and microwaves from an antenna of a communications system. rank these type of waves in terms of increasing photon energy.

The vapour pressure of benzene is 53.3 kpa at 60.6 °c, but it fell to 51.5 kpa when 19.0 g of a non-volatile organic compound was dissolved in 500 g of benzene. calculate the molar mass of the compound.

Could we see a galaxy that is 20 billion light-years away?