Acomputer can produce a list of random numbers.

Which two statements are true about a system? 1. a system is a group of objects analyzed as one unit. 2. energy that moves across system boundaries is conserved. 3. there’s only one way to define the boundaries of a system. 4. all systems are made by humans.

Why do you think electric energy for households is generally supplied by power plants instead of by an electric generator at home.

The measure of the angles supplement is 30 more than four times that of its complement. find the measure of the angle described