một electron bay vào trong không gian có từ trường đều có cảm ứng từ B = 0.2 với vận tốc ban đầu v0 =2×10∧5 m/s vuông góc với vec tơ B lực lorenxo tác dụng vào electron có độ lớn là

a

explanation:

because they are cartillidge

first thing first of the answer is with technology. second thing second thing is that the big bang theory did not happened u see they say it did but what they dont realize is that like dinasures are still a round they might deny it but they and look at these 12 foot human skelteons they find lets see didnt the bible say something about giants. hope this peace.

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.