Three positive charges a, b, and c, and a negative charge d are placed in a line as shown in the diagram. all four charges are of equal magnitude. the distances between a and b, b and c, and c and d are equal.

when it gains or loses electrons

iron would move it is magnetic there is a mag field around the current in the wire

the area between the graph and the t axis

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles