Date: ........................................................

Assessment 31

Form 4T

Name: ..................................................................

1. A hollow box of mass 100 kg has dimensions 1.0 m by 2.0 m by 3.0 m. Take g as 10 N/kg.

a. Find the volume of the box. [2]

b. Find the weight of the box.[2]

c. Find the density of the material that makes up the box.

[2]

d. Find the maximum pressure. [3]

2. a. Draw a diagram of a barometer, showing the essential features.

[3]

b. The pressure of a gas supply is 5.0 cm of mercury above the atmospheric pressure of value 1.01 x 105 Pa.

I. Find the pressure due 5.0 cm of liquid mercury, given that pressure due to a liquid of height h is given by:

p = h x ρ x g [2]

where ρ: density of mercury = 13,600 kg/m3

II. Find the gas pressure. [1]

TOTAL: 15 MARKS