Một vật giao động điều hoà với phương trình x=10cos(5πt) cm. Tính quãng đường vật đi được từ lúc bắt đầu dao động (t=0) đến thời điểm t=1s

Rohit is trying to tune an instrument

Frequency of electromagnetic waves that a radio station is assigned is called

Mary starts from her house, walks 80 meters south, and stops to chat with her aunt on the sidewalk. after chatting for a few minutes, she walks 125 meters to the west to meet a friend and then walks 45 meters north with her friend to a cafe for lunch. overall, she takes 10 minutes to do all this. what is mary’s average speed?