1. Most automobiles have a coolant reservoir to catch radiator fluid that may overflow when the engine is hot. A radiator is made of copper and is filled to its 20-L capacity when at 10 °C. What volume of radiator fluid will overflow when the radiator and fluid reach their 95 °C operating temperature, given that the fluid's volume coefficient of expansion is ß= 400 x 10-6/°C? Note that this coefficient is approximate, because most car radiators have operating temperatures of greater than 95 °C. The volume coefficient of expansion of copper is 5.1 x 10-5/°C. Think and Prepare 1. Consider the expansions of both the fluid and the copper radiatior. Do they expand at the same rate or different rates? Which object expands more? 2. Will the radiator fluid overflow or will it be contained in the radiator body on expansion? AV:

1. Most automobiles have a coolant reservoir to catch radiator fluid that may overflow when the engine is hot. A radiator is made of copper and is filled to its 20-L capacity when at 10 °C. What volume of radiator fluid will overflow when the radiator and fluid reach their 95 °C operating temperature, given that the fluid's volume coefficient of expansion is ß= 400 x 10-6/°C? Note that this coefficient is approximate, because most car radiators have operating temperatures of greater than 95 °C. The volume coefficient of expansion of copper is 5.1 x 10-5/°C. Think and Prepare 1. Consider the expansions of both the fluid and the copper radiatior. Do they expand at the same rate or different rates? Which object expands more? 2. Will the radiator fluid overflow or will it be contained in the radiator body on expansion? AV: