Vật dao động điều hòa, biên độ 10cm, tần số 2Hz, khi vật có li độ x=-8cm thì vận tốc dao động theo chiều âm là

What is the difference between electrically neutral objects and electrically charged objects

Need people build a dam to create a reservoir that supplies water a nearby city needs. describe two ways this action will likely affect the water cycle in the local environment. (5 points) worth 20 points

Which accounts for an increase in the temperature of a gas that is kept a constant volume