Một dòng điện có cường độ I=10Achạytrongmộtdây dẫn rất dài, phần giữa có dạng một cung tròn bán kính R = 20 cm như hình vẽ. Biết góc  = 600. Hệ thống đặt trong không khí. Xác định hướng và độ lớn của vectơ cảm ứng từ tại tâm O của cung tròn.

Current 1 of 8.4 a runs for 240 seconds and then stops. current 2 is 10.5 a. how long does current 2 have to un to deliver the same amount of charge as current 1? 88.28 192 s 2016 s 21,000 s

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.

Which lists the organs in the correct order as food passes from the mouth to anus?