Which of the following releases matter? A. engaging a car exhaust system B. picking up iron filings with a magnet C. turbines spinning in a power plant D. turning on an electric hot plate

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Used the balanced equation 2h2+ o2 - -> 2h2o. if you have 7.2 grams of o2 , how many grams of h2o can you produce ?

Which are examples of how technology has advanced scientific understanding.1using hot water to sterilize medical equipment.2transplanting a human organ into another individual.3inserting genes from one sheep into another cell to make a cloneunderstanding the different structures that make up a cell.4examining microorganisms from the deepest parts of the ocean