You plan to number each account in your Chart of Accounts. You want to have major categories and 2 levels of sub-categories. Each level of category will be represented by a digit. You want to have room in your numbering for at least ten accounts within the lowest level of sub-categories. How many digits do you need in your account numbers?

Phase changes are chemical changes. true or false

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s.a. determine jay’s mass.b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?