Acar travels 40 miles in 30 min. calculate the car's average speed in mi/hr.

Stars x and y are both bluish main sequence stars. star x has a higher absolute brightness than star y. how do the two stars compare? explain

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

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.