PLEASE HELP A torpedo fired from a submerged submarine is propelled through water with a speed of 20 m/s and explodes upon impact with a target 2000.0 m away. If the sound of impact is heard 101.4 seconds after the torpedo was fired, what is the speed of sound in water?

In a system, when potential energy decreases, then entropy also decreases. true false

According to the image below, which season is about to begin in the southern hemisphere? a. summer b. autumn c. winter d. spring

Listed following are various physical situations that describe how light interacts with matter. match these to the appropriate category. 1) transmission? -visible light meets clear glass -visible light does not pass through a black wall -red light hits a red sweatshirt -light comes from your computer screen -cell phone signals pass through walls -blue light hits a red sweatshirt -white light hits a white piece of paper -light comes from a light bulb