题目内容

The direction of additional pressure at the curved liquid surface is ().

A. pointing into the liquid
B. pointing out of the liquid
C. along the surface of the liquid
D. pointing to the center of curvature

查看答案

搜索结果不匹配？点我反馈

更多问题

The ratio of radius of two capillary tubes is 1:2 and both tubes are inserted into water. If water completely wets the wall of the tube, the ratio of the rising height of water in the two tubes is()

A. 1:2
B. 2:1
C. 1:1
D. 4:1

查看答案

When the contact angle is equal to 20 degrees, it represents liquid can () solid

A. wet
B. not wet
C. completely wet
D. not at all wet

查看答案

Which of the following is responsible for the fact that the increase in magnification of a microscope does not enable us to see more clearly in detail? ()

A. the linear propagation of light
B. the refraction of light
C. the reflection of light
D. the diffraction of light

查看答案

The necessary conditions for producing x-rays are : ()

A. high voltage power supply and low voltage power supply
B. high voltage power supply and X-ray tube
C. high voltage power supply and suitable target material
D. high speed electrons beam and proper target

查看答案

The direction of additional pressure at the curved liquid surface is ().

A. pointing into the liquid B. pointing out of the liquid C. along the surface of the liquid D. pointing to the center of curvature

The ratio of radius of two capillary tubes is 1:2 and both tubes are inserted into water. If water completely wets the wall of the tube, the ratio of the rising height of water in the two tubes is()

When the contact angle is equal to 20 degrees, it represents liquid can () solid

Which of the following is responsible for the fact that the increase in magnification of a microscope does not enable us to see more clearly in detail? ()

The necessary conditions for producing x-rays are : ()

A. pointing into the liquid
B. pointing out of the liquid
C. along the surface of the liquid
D. pointing to the center of curvature