According to some nineteenth-century geological theories (now largely discredited), the Earth has been shrinking as it gradually cools. If so, how would g have changed over geological time? 1. It would not change; the mass of the Earth remained the same. 2. It would increase; g is inversely proportional to the square of the radius of the Earth. 3. It would decrease; the Earth’s radius is decreasing.

3 because if they believed earth was shrinking as it cooled than it’s over all radius would decrease

Currently, as of february 2016, an american traveling in france would be by the exchange rate. the weakness of the euro and the strength of the us dollar means that items in france cost less to an american than they otherwise would. of course, if this trend reverses and the us dollar weakens and the euro strengthens, such as was happening in early 2008, an american traveling in france would have an adverse experience because items would cost relatively more.