Waves in a lake are 5.00m in length and pass an anchored boat 1.25 s apart. the speed of the waves is: a. 0.25 m/s
b. 4.00 m/s
C. 6.25 m/s
d. 3 × 108 m/s​

Esign techniques and materials that reduce the negative environmental impact of a structure are referred to as

Select the correct text in the passage. which sentences describe examples of sustainable living? i live in an old apartment building downtown, but my company is based in an office park on the outskirts of the city. i drive an old car that needs to be replaced. i plan to buy a hybrid for better gas mileage, but for now i am able to carpool with a couple of friends from work. the drive to the office park is about 45 minutes each way, but we do get to work in a modern building. the architects just received a leed certification for the design.

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.