Question

1.If we changed our speed limit signs to metric, what would probably replace the following? (Enter your answers to the nearest km/h.)

(a)    15 mi/h
km/h

(b)    80 mi/h
km/h

2.A quantity of water is poured into a graduated cylinder, which then reads 154 mL. What is the mass of the water in kilograms?

Answer 1

a) 1 mile = 1.609 km

15 mi/h = 15 x 1.609 km / h

15 mi/ h = 24.135=24.14 km/h

b) 80 mi/h = 80 * 1.609 = 128.7 km/h

2) volume = 154 mL = 0.154 L =

but 1 L = 1 kg

0.154 L = 0.154 kg =

154 mL = 0.154 Kg