Question

1. When there is an imbalance in air pressure. will be needed to determine the speed of moving air.

a) Bernoulli's Principle

b) Archimedes' Principle

c) Charles' Law

d) Pascal's Principle

2 . You add ice ( 0° C) to iced tea (20°). What mass of ice is required to bring the temperature of 250 g of iced tea to 5° C ? Used iced tea = water = 4.190 kg-1 K-1 , water = 334 kJ kg-1

a) 44.3g

b) 114.6 g

c) 100 g

d) 300g

3. I decide to mix an ice cube into my hot tea . What happened ?

a) A phase change occurs , so we need to consider the heat of fusion for water.

b) No phase change occurs.

c) a phase change occurs , so we need to consider the heat of vaporization for water.

Answer 1