Author Question: At a restaurant you are served coffee before you are ready to drink it. In order that the coffee be ... (Read 104 times)

Mr3Hunna · **on:** Jul 28, 2018

At a restaurant you are served coffee before you are ready to drink it. In order that the coffee be the hottest when you are ready for it, when would it be best to add cream (at room temperature) to it?
a. when you are ready to drink it
b. right when you are served the coffee
c. it doesn't matter, as the final temperature will be the same

Question 2

The pilot of an aircraft flies due north relative to the ground in a wind blowing 40 km/h toward the east. If his speed relative to the ground is 80 km/h, what is the speed of his airplane relative to the air?
a. 89 km/h
b. 85 km/h
c. 81 km/h
d. 76 km/h
e. 72 km/h