音速

LETHALFORCE:I wonder what Interceptors and radar were use since ICBM's travel at Hypersonic speeds??

我不知道中国这次用的什么拦截系统和雷达，因为洲际弹道导弹的飞行速速是超高音速的。

Locality of action shows itself in the finite speed of light, in the inverse square law of fields, and in macroscopic statistical effects, such as rates of reaction and the speed of sound.

作用力的局限性体现在光速是有限的，体现在场的平方反比定律之中[6]，还体现在宏观统计效应上，如反应速度和音速等。

In this article, the existence and uniqueness of the generalized solution of this boundary value problem are discussed, the existence and convergence of Galerkin's approximate solution is proved, and Linear dependence of the the error bound on M~2/(1-M~2) is also proved, where M is Ma...

本文证明了这类方程弱解的存在和Galerkin逼近解的存在和收敛，并且还给出了有限元解的误差估计，指出误差界线性地依赖于M~2/(1—M~2)。M为马赫数。也就是说，当流速接近音速时，有限元解的误差将无法控制。

Mach'.'' 2, it is flying at twice the speed of sound.

马赫'。''的速度飞行，那么它的速度就是音速的两倍。

If a plane is flying at Mach 2, it is flying at twice the speed of sound.

假如飞机以二马赫的速度飞行，那么它的速度就是音速的两倍。

This was necessary to decrease the muzzle velocity of the bullet so it would be below the speed of sound.

这是必要的，以减少对初速的子弹，所以将低于音速。

It announced a programme "to establish the technology foundation by 2001 to support the US transport industry's decision for a 2006 production of an environmentally acceptable, economically viable aircraft with notional design features of 300 seats, 5,000 nautical mile range and a M2.4 cruise speed."

NASA还公布了"要在2001年前为支持美国运输工业的目标奠定科技基础。这个目标就是能在2006年建造一种环境舒适，价格合理的，在预想的设计中具有300个座位，5000英里航程并且巡航速度达到2.4倍音速的飞机。"

Firstly, stability of a hypersonic boundary layer on a blunt cone with small nose bluntness at zero angle of attack has been investigated and the transition location was predicted by the e-N method.

本文研究零攻角和小攻角、超音速和高超音速、尖锥和小钝头锥边界层的转捩预测问题。

Use pattern of Gao-Yong compressible onflow, 2 dimension of numeric imitate RAE2822 wing section differs in two kinds will shed what the circumstance falls to cross velocity of sound agglutinant circle sort a problem.

梗概： 应用Gao-Yong可压缩湍流模式，数值模拟RAE2822二维翼型在两种不同来流情况下的跨音速粘性绕流新问题。

In the meantime, mutual to shock wave of wing section surface and attrib border layer interference and turn turn problem undertakes analytic computation, the result makes clear, the numeric method with proper union of mode of Gao-Yong compressible onflow can succeed ground imitate wing section steps sonic and agglutinant flow.

同时，对翼型表面激波和边界层相互干扰以及转捩新问题进行分析计算，结果表明，Gao-Yong可压缩湍流模式结合适当的数值方法能够成功地模拟翼型跨音速粘性流动。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。