问两道英文物理题.1、An 819 N bungee jumper falls from a bridge that is 674 x 10-1 m high. The force constant of the bungee cord is 1.50 x 101 N/m, and its unstretched length is 7 m. How far above the ground is the jumper, when he reaches a s

问两道英文物理题.1、An 819 N bungee jumper falls from a bridge that is 674 x 10-1 m high. The force constant of the bungee cord is 1.50 x 101 N/m, and its unstretched length is 7 m. How far above the ground is the jumper, when he reaches a s An={n （1 2个物理题,帮忙做算下.最好用英文1.Two identical tiny spheres carrying the same charge are 1.0 m apart center to center in vacuum and experience an electrical repulsion of 1N.What is their charge?2.Find the ratio of the electrostatic and 一道大学物理题（由于小弟英语授课）英文题目Two small,positively charged spheres have a combined charge of 2.5×10-5C.If each sphere is repelledfrom the other by an electrostatic force of 1N when thespheres are 2 m apart,what is th 一道英文(sat2)物理题 英文物理题（牛二律）An 92 N box of oranges is being pushed across a horizontal floor.As it moves,it is slowing at a constant rate of 0.80 m/s each second.The push force has a horizontal component of 40 N and a vertical component of 45 N dow 已知数列{an},当n∈N*时都有an>0,且an^2≤an-a(n+1),证明an 若数列an=(1+1/n)^n,求证an an=n(n+1) 求sn 数列{an}满足a1=1 an+1=2n+1an/an+2n 数列｛an},a1=1,an+1=2an-n^2+3n,求｛an｝. 数列{an}中,a1=1,an+1/an=n/n+2,求an 又一道物理题,英文版,Consider an electron trapped in an infinite well whose width is 98.5pm .If it is in a state with n=15,what are (a)its energy(b)The uncertainty in its momentum(c)The uncertainty in its position.最好有个方程，好看 物理题：1Pa=1N/m^2表示什么 在{an}中an>0 Sn=1/2（an+n/an）求an 已知数列｛an｝中a1=6,且an-an-1=(an-1/n)+n+1(n属于N*,n≥2）,求an 数列{an}中,a1=2,an+1=4an-3n+1,求证{an-n}是等比数列 4an中n为下标an+1中n+1为下标an-n中an的n为下标 已知数列{an}中,a1=1,an+1=3an/(an+3)(N∈N*),求通项an,