Final answer:
The change in position of the minute hand of a clock at 4:00 corresponds to a 90-degree angle.
Step-by-step explanation:
The change in position of the minute hand of a clock can be matched with the angle made by the changes by using the relationship between time and angles on a clock. the sign indicates the direction of the field or potential difference that a positive charge would move. Positive voltage means it attracts negative charges and repels positive ones while negative voltage does exactly the opposite. In this case, the clock shows 4:00, so the hour hand is on the 4 and the minute hand is on the 12. The minute hand moves 1/4 of the way around the clock face, which corresponds to a 90-degree angle.