Convert a speed of 30 mph to m s^{-1}, given that 1.0 mile = 1.609 km

804 m s^{-1}

13.4 m s^{-1}

5.17 m s^{-1}

None of the above

Convert a pressure of 15 psi (pounds per square inch) to Pa, given that 1 cm = 0.394 inch, 1.0 ‘pound’ force is equivalent to 4.448 N, and that 1.0 Pa = 1.0 N m^{-2}. Select the closest answer from:

10.3 Pa

2.63 ×10^{3} Pa

1.03 ×10^{5} Pa

4.30 ×10^{6} Pa

Convert a wavelength, λ, of 1600 nm to wavenumber, ν in cm^{-1}, given that: Wavenumber, ν = 1/(Wavelength, λ, expressed in centimetres)

625 cm^{-1}

62.5 cm^{-1}

0.625 cm^{-1}

None of the above

Calculate the Body Mass Index, BMI, for a person of ‘weight’ 12 stone 5 pounds and height 5 feet 10 inches. Body Mass Index, in units of kg m^{-2}, is given by:

(1 stone = 14 pounds, 1 kg = 2.20 pounds, 1 foot = 12 inches and 1 inch = 2.54 cm)

24.9

20.1

44.9

None of the above

3.2 g of NaCl are dissolved in water to produce 100mL of a final solution. The molecular mass of NaCl is 58.4, i.e. 1.0 mol of NaCl has a mass of 58.4 g. Calculate the concentration of the solution in mol dm^{-3}. (1.0 L = 1.0 dm^{3})