As an interstellar gas cloud shrinks in size, its gravitational potential energy:

The large connected urbane area from boston to washington, d.c. is often referred to as

The european union was formally established in

Sam hated the long nights of winter! his mother called him in from playing so early: around 4: 30 pm! it is usually dark out when sam is eating supper. what letter represents the long nights where sam lives? a) a. b) b. c) c. d) d.