As the presidential election of 1868 drew near, Republicans nominated Civil War hero Ulysses S. Grant. Although Grant had never held public office, he had been a successful Union general, was popular in the North, and served as a reminder that Republicans had won the war.
In the metric system mass is measured in kilograms and grams and these will be the units we will most often use. (In the United States today, almost no one knows what the unit of mass is called--it's not the pound. The pound is a unit of weight--more about weight in the next paragraph.ou will measure the mass of objects by comparing them to the mass of pennies with a thing we will call a Mass Balance. Although mass is usually measured in kilograms or grams, we will measure mass in pennies.
Since on the Earth's surface weight and mass are proportional, for everyday usage it doesn't matter which units you use. You can say that you weigh 70kg or 686 N (not 70 N!). (But in physics, weight is a force, measured in N not kg.) What a scale actually measures depends on the type of scale. A typical bathroom scale measures force--your weight.