An object is placed at 10.2 cm in front of a diverging lens with a focal length of -10.6 cm. What is the magnification

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=

If you let go of the notebook after lifting it, will it move? how?