Một electron di chuyển trong một từ trường đều theo chiều dương trục x vuông góc với cảm ứng từ 7 mT thì khoảng thời gian cần thiết để electron đi hết vòng tròn là:

Bernie drove home from a vacation in 1.5 hours. he traveled a total distance of 60 miles. what was his average speed in miles per hour? a. 60 mph b. 90 mph c. 40 mph d. 55mph

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of