The speed of sounds in water is about ___ in air.A:as four times fast asB:four times as fast asC:four times as faster asD:as four times faster as 相关知识点: 试题来源: 解析 B 本题主要考查比较状语从句。as + 形容词原级 + as,意为“和……一样……”。表示倍数时,应位于结构as...
声音在水里传播的速度是在空气中传播速度的四倍。
The speed of sounds in water is ab< underline>out< /underline> _._in air. A. four times as great as B. as great as four times C. as great four times as D. as four times great as 相关知识点: 试题来源: 解析 A 反馈 收藏 ...
The speed of light is a universal constant in a vacuum, like the vacuum of space. However, light *can* slow down slightly when it passes through an absorbing medium, like water (225,000 kilometers per second = 140,000 miles per second) or glass (200,000 kilometers per second = 124,...
A. The speed of light increases. B. The speed of light decreases. C. The wavelength of light increases. D. The frequency of light changes. 相关知识点: 试题来源: 解析 B。光从空气进入水中时,速度会减小,选项 A 错误;波长会变短,选项 C 错误;频率不变,选项 D 错误。反馈...
When light passes from air to water, what happens to its speed? A. Increases B. Decreases C. Remains the same D. Depends on the color of light 相关知识点: 试题来源: 解析 B。解析:光从空气进入水中时,速度会减小。这是因为光在不同介质中的传播速度不同,光在折射率较大的介质中传播速度较...
When a light ray passes from air into water, what will happen to its speed? A. Increase B. Decrease C. Remain the same D. Double 相关知识点: 试题来源: 解析 B。解析:当光线从空气进入水中时,根据折射定律,光在水中的传播速度会减小。因为水的折射率大于空气的折射率,光从光疏介质进入光密介...
6 p. 37), the rapid softening method by water .and air annealing of high speed steels (SKH 8 & SKH 6) was studied by micrography and hardness test. The results obtained were summarized as follows: The hardness of the quenched high speed steel that had been annealed in water or air ...
the rise in transonic wave drag and the effects of the associated buffet on the aircraft structure. The effect of high altitude operation affects both of these speed boundaries. For a given wing area and sectionalCLmaxvalue, thestall speedwill increase as air density reduces as defined below: ...
An experimental study is presented of the transfer of heat from a warm body of water to an air flow above it. This work was conducted in a wind/water tunnel, permitting these experiments to be conducted over a range of wind speeds and heat fluxes. The temperature field of the air/water...