PHYSICS FORM 1-PRESSURE

A block of metal of density 8.9g/cm³ measures 10cm x 5cm x 4cm. Given that the force of gravity is 10N/Kg, determine;maximum and minimum pressure it can exert on a horizontal surface.

• p_max =0.936 p_min = 0.546

• p_max =1000 p_min = 350

• p_max =9360.7 p_min = 5460.4

• p_max = 9.36 p_min = 5.46

A diver is 40000 mm below the surface of water in a dam. If the density of water is 1 000 Kg/m³ and atmospheric pressure is 1.036 x 10⁵ Pa, determine the total pressure on the diver.

• 400 103 600

• 503 600

• 503 000

• 400 000

In a hydraulic press, a mass of 60 000g is applied to a master piston of area 3500 mm². If the press is designed to produce a force of 10 000 N, determine the diameter of the slave piston in centimetres.

• 92.83

• 185.66

• 136.26

• 27.26

The barometric height of a town is 640 mmHg. Given that the standard atmospheric pressure is 70 cmHg and density of mercury is 13 600 Kg/m³, determine the altitude of the town in metres if density of air is 1.25 Kg/m³.

• 1088

• 6.528

• 62 016

• 6528