Question 154
Work in groups. Use a block of wood to model a ship. Prepare different water conditions and test how your model floats in each. Mark load lines on your model. Explain how the different water conditions affect how the ship floats.
You can use a large bucket or deep sink, a large wooden block, salt, a balance, a thermometer and a method of heating water. For best results, a block that floats with at least 10 cm below the water surface is suggested. Model fresh water using pure water with no added salt. Find out how much sodium chloride to add to model sea water. The book gives winter sea water a minimum temperature of −2 °C and summer sea water a maximum of 27 °C.
You can use a large bucket or deep sink, a large wooden block, salt, a balance, a thermometer and a method of heating water. For best results, a block that floats with at least 10 cm below the water surface is suggested. Model fresh water using pure water with no added salt. Find out how much sodium chloride to add to model sea water. The book gives winter sea water a minimum temperature of −2 °C and summer sea water a maximum of 27 °C.
