1) The speed limit on some interstate highway is roughly 100 km/h. (a) what is this in meters per second? (b) How many miles per hour is this?

(2) The density of aluminum is 2.7g/cm^3. What is the density in kilograms per cubic meter?

(3)Suppose you walk 18.0 m straight West and then 25.0 m straight north. How far are you from your starting point? What is your displacement vector? What is the direction of your displacement? Assume the +x-axis is horizontal to the right.