What are three disadvantages of using a manufactured object as the standard meter bar?

What other 2 word expression means in dispute? How do you write 167 hundredths as a decimal? How many digits in 10 billion million? What are the six prime numbers less than 10? Which is greater 10 in or 200 mm? What is 6 trillion times 130000? What is 20 percent of 120000.00? Which is the biggest kilometer meter centimeter or millimeter? What is wrong with the number 13? How many vertical do a cuboid have? How do you solve 6n plus 128 plus 8n? Why is division associative? What is a plane figure formed by a set of points that are all the same distance from a center point? Is negative three fifths an integer? How many minutes are in three quarter of an hour? What nuts make you smart? Why do you count when you walk? What is the lowest common multiply of 24 and 30? What number has eight millions four fewer hundred thousands than millions three fewer ten thousands than millions two more thousands than hundred thousands four fewer hundreds than ten thousands? What is the height are light switchs unually mounted in a room?