Record your prediction (hypothesis) as an "if then" statement. (for example: if you select the go button, then the train will move)
if  the sound source is moving  then the pitch of the sound will to the observer.

Groups of organs that work together to complete a process in the body are called: a. cells b. tissues c. nerves d. systems

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.

Wind and moving water provide energy. question 1 options: chemical mechanical thermal none of the above