a solid cylindrical flywheel is 1.2m in diameter and has a m

英语翻译
a 6-cm-diameter metal cylindrical scatterer in free space is modeled.The source excitation is a Gaussian pulse with a carrier frequency of 5 GHz.The grid resolution (dx = 3 mm) was chosen to provide 20 samples per wavelength at the center frequency of the pulse (which in turn provides approximately 10 samples per wavelength at the high end of the excitation spectrum,around 10 GHz).The computational domain is truncated using the perfectly matched layer (PML) absorbing boundary conditions.

Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about the specified axis.
y = 10x − x2,y = 21; about x = 3
答案不是112.为什么不对啊!
方程是y ＝ 10x - x^2,y = 21;

英语翻译
dynamic characteristics of combined conical-cylindrical shells
其中conical-cylindrical应该怎么翻译

AP:what is the radius of a cylindrical soda can with volume of 512 cubic inches that will use
what is the radius of a cylindrical soda can with volume of 512 cubic inches that will use the minimum material?

英语翻译
我在一个英语的期刊上看到这样一句,Also,completely cylindrical cores centrally arranged within buildings which are square or cylindrical on plan have been adopted (1,pp.134,136).
请问括号里的部分(1,pp.134,136).

calculus,
use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about y-axis,
y=2+x-x^2, x + y =2
V=(?)