Which describes a frame of reference most likely to be used in high school physics lab motion experiments? A. distances measured from the center of Earth B. positions determined relative to the observer's center of gravity C. fixed x, y, and z axes with a zero point on the floor D. positions measured from a zero point on the moving object

Been sitting here trying to take this test and don't know this answer! place the events of a feedback mechanism associated with body temperature in the correct order. ·nerve cells send message from skin to the brain ·body returned to normal temperature around 98.6 degrees f ·temperatures regulation center in the brain sends out signals ·body temperature exceeds 98.6 degrees f ·sweat glands throughout the body activate to cool off skin surface it is a 1 through 5 question in biology!