Aşağıdakilerden hangisi fiziksel anlamda bir iş yapmıştır? A- Srtında çanta ile durakta bekleyen çocuk B- Ağır yük taşıyan işçi C- Kirap okuyan çocuk D- Merdiven ile üst kata çıkan adam bE- Düz yolda yürüyen adam (açıklayarak çözerseniz daha iyi olur )​

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=