Một đoạn dây AB có dòng điện 10A; một dây dẫn khác rất dài, song song với AB và cách AB 50cm, có dòng điện 40A chạy qua như hình vẽ. Xét điểm M nằm trên đường thẳng AB, cách B 5cm. Xác định hướng và độ lớn của vector cảm ứng từ do hai dòng điện này gây ra tại M ?

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)