Question 13 A horizontal venturi meter is used to measure the flow rate of oil of specific gravity 0.9. The inlet
and throat diameter of a horizontal venturi meter are 400 mm and 150 mm respectively. The
pressure intensity at inlet is 0.20 N/mm' while the pressure head at the throat is 360 mm of
mercury. Take the coefficient of discharge of venturi meter 0.98.
a) Calculate difference in Pressure head.
b) Calculate theoretical discharge.
c) Calculate actual discharge
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Identify the missing numbers below to show the result of multiplying the numbers (1.6 × 10-19)(5.0 × 106) = c × 10d

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next

Write the formula for the following chemicals. 7. e. trinitrogen tetraoxide a calcium phosphate f. magnesium acetate b. potassium sulfide g nickel(iii) cyanide c carbon dioxide h. silver sulfate d. cobalt(ii) chloride