What is an example of a chemical change that occurs as part of the rock cycle a) lava cools and condenses on the earths surface b) sedimentary rocks are worn away by water erosion c) igneous rocks are cracked and broken into smaller pieces by weathering d) sedimentary ricks are turned into metamorphic rocks by heat and pressure

Car batteries are often rated in amp-hours. this rating indicates the quantity of charge that can pass through the battery before the battery's chemical energy must be restored by the car's generator or some other source. the amp-hour unit is convenient for simple calculations. for example, a 60-amp-hour battery can supply a current of 1.0 a for 60 h (or 60 a for 1.0 h) before going dead. find the energy stored in the following. (a) a 58 a-h, 10 v car battery(b) a 1.3 a-h, 1.7 v flashlight battery