9. Ima Speedin puts the pedal to the metal and increases her speed as follows: 0 mi/hr at 0 sec; 20 mi/hr at 2 sec; 40 mi/hr at 4 sec; 60 mi/hr at 6 sec; and 80 mi/hr at 8 sec. What is the acceleration of
Ima's car?

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

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.

An athlete is holding 24 lb of weights at a height of 6 inches above the stack as shown. to lower the weights, she applies a constant force of 5 lb to the handle. determine the velocity of the weights immediately before they hit the stack.