A periodic pulse travels a distance of 20.0m in 1.00s. If its frequency is 2.0 x 10³Hz. Calculate the wavelength.
A. 1.0 x 10‾³m B. 1.0 x 10‾²m C. 2.0 x 10‾²m D. 1.0 x 10²m Correct Answer: Option B B. 1.0 x 10‾²mThe temperature at which the saturated vapour pressure of a liquid is equal to the external atmospheric pressure is known as its?
A. dew point B. boiling point C. lower fixed point D. Tripple point Correct Answer: Option B B. boiling pointThe mass of water vapour in a given volume of air is 0.05g at 20°C, while the mass of water vapour required to saturate it at the same temperature is 0.15g. Calculate the relative humidity of the air.
A. 3.33% B. 5.55% C. 33.33% D. 55.55% Correct Answer: Option C C. 33.33%A piece of metal of mass 50g is cooled from 80°C to 20°C. Calculate the amount of heat lost. (specific heat capacity of the material of metal = 450Jkg‾¹K‾¹)
A. 4.50 x 10³J B. 2.25 x 10³J C. 1.80 x 10³J D. 1.35 x 10³J Correct Answer: Option D D. 1.35 x 10³JThe volume and pressure of a given mass of gas at 27°C are 76cm³ and 80cm³ of mercury respectively. Calculate the volume at s.t.p
A. 36.2cm³ B. 72.8cm³ C. 100.0cm³ D. 808.9cm³ Correct Answer: Option B B. 72.8cm³Products
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