A level a metal bar is heated to a certain temperature and then th heat source is removed .at time t minutes after the heat source is removed ,the temperature ,θ degrees clelsius ,of the metal bar is given by θ=280/1+0.02t,at what rate is the tempe

A level a metal bar is heated to a certain temperature and then th heat source is removed .at time t minutes after the heat source is removed ,the temperature ,θ degrees clelsius ,of the metal bar is given by θ=280/1+0.02t,at what rate is the tempe PHYSICS! A level Modular Questions,Turing Effects(A LEVEL的一道物理题,帮我解答一下,谢）A uniform metal bar is 2.4m long and is suspended from a factory ceiling by a chain at a distance of 60cm from one of the ends. The point at which th A level bar a与bar g什么区别 Bar(A)是什么单位 a bar of chocolate a bar on the 英语单词练习1条D__ means short bar with a metal ball at each end,used for exercising the muscles of the arms and shoulders ligand和transition metal 的联系 以及两者之间对不同co-ordinate number的影响A-level How about Zn? A-level和O-level是什么? A-Level物理问题 a level是什么 什么是A-Level? a level是什么 a level是什么 with a metal voice还是in a metai voicewith a metal voice还是in a metal voice打错了。 a bar of怎么造句 a bar 该怎么用?