một vật dao động điều hòa có biên độ A, chu kì T, thời điểm ban đầu t = 0 vật đang ở vị trí biên. Quảng đường vật đi được từ thời điểm ban đầu đến thời điểm t = T/4 là

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Imagine you work as a consultant, and your daily job involves listening to the constructive criticism of others. as part of your job, you must listen to opposing viewpoints to make important decisions. in this activity, you are a consulting dam engineer. you must make a decision about four different dams; should they be repaired, taken down, or left alone? you will listen to contrasting opinions about what should be done with the dams before you make the final decision. as the consulting dam engineer, what do you decide to do with this dam? explain your reasoning. by making your decision, did you support the opinions of the mayor and/or the dam safety official? why or why not? (site 1)

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?