Vật thật AB cao 1,2cm đặt vuông góc với trục chính của một thấu kính hội tụ có độ tụ 5 đp và cách thấu kính 10cm. Ảnh thu được là

How many seconds does it take a pebble released from rest off a bridge to fall 29.4 m ? what is the pebble's speed when it has fallen 29.4 m ?

In the circuit, the switch s has been open for a long time and r = 125 kohm. it is then suddenly closed. (a) determine the time constant before the switch is closed. s (b) determine the time constant after the switch is closed. _ s (c) let the switch be closed at t = 0. find the current in the switch as a function of time. (use t for time. express your answer in milliamps and seconds.) i(t) =_

What is a costume plot? why is it important to a film or theater production?