Students compete in a short race at a track meet. Which of the following observations is a qualitative change that occurred during the race? * The distance ran by a student in meters
the time passed from start to finish in seconds
the heart rate of a students in beats per second
the colors of the students' faces as they ran

Several processes form metal ore. match each process to its description. volcanic activity weathering hydrothermal energy rocks break down as they interact with air and water. arrowright density differences and other factors cause metals to concentrate in igneous rocks. arrowright seawater heats up from contact with hot rock, and metals dissolve in it. the water rises and contacts cooler water, causing metal ores to settle on the ocean floor. arrowright

State the right hand rule of the direction of magnetic field in a conductor carrying current

Acup of coffee sits on the dashboard of an automobile. the car goes around a sharp curve. even though you hold the cup still, coffee still splashes out. this can best be explained due to a) density. b) friction. c) gravity. d) inertia.