1989 - WAEC Physics Past Questions and Answers - page 2
A thermometer has its stem marked in millimeter instead of degree Celsius. The lower fixed point is 30mm and the upper is 180mm. Calculate the temperature in degree celsius when the thermometer reads 45mm.
Which of the following surfaces will radiate heat energy best?
Which of the followiempeng statements is/are not correct?
Water in an open container boils at a lower temperature when heated at the top of a mountain than at sea-level because at the top of a mountain the
Which of the following substance is not a good conductor of electricity?
Calculate the heat energy required to vapourize 50g of water initially at 80oC if the specific heat capacity of water is 4.2Jg-1K (specific latent heat of vapourization of water is 2260Jg-1).
A block of ice at its melting point is left on a table in the atmosphere and observed to melt gradually. Which of the following statements is true about the melting process?
All the heat generated by a current of 2A passing through a resistor of 6Ω for 2.5s is used to evaporate 5 g of a liquid at its boiling point. What is the specific latent heat of the liquid?
Which of the following instruments can be used to compare the relative magnitudes of charges on two given bodies?
A short chain is usual attached to the back of a petrol tanker trailing behind it to ensure that the