Tại 2 điểm A và B cách nhau trong không khí có đặt 2 điện tích q1 = q2 = 16.108 C. Xác định cường độ điện trường do hai điện tích gây ra : a) M với MA = MB = 5 cm
b) N với NA = 5 cm , NB = 15 cm
c) C biết AC = BC = 8cm

The step-down transformer gives a current of 10a at 24v if the primary voltage is 240v calculate the 1_primary current 2_the power input 3_the power output

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?