The astronomers found an "X-ray mass" only a tenth of the mass found using the gravitational lens method.

天文学家发现“X射线估算的质量”仅有“引力透镜”方法估算的质量的十分之一。

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The intensity of those X-rays can vary periodically, depending on the black hole's mass.

这些X射线的强度会根据黑洞的质量而周期变动。

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So, switching the area, moving the area to the other side, I'll get double integral of xdA is the area of origin times the x coordinate of the center of mass.

那么，改变一下区域，把这块移到另一侧，我们得到对xdA的双重积分,是原点那的圆面积乘质心的x的坐标。

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This spring is getting squashed on either side, and it'll squash by certain amount x, that depends on your mass, and that x will be turned into a motion of a needle and that'll read your mass.

这个弹簧两边都会受到压缩,压缩量为 x,它由你的质量决定,x 会转换成指针的运动,你从而可以读数

耶鲁公开课 - 基础物理课程节选

During the star's extended eruptions, the researchers noted that V1647 gathers mass, spews plasma and X-rays, and exhibits a staggering increase in temperature.

MSN: Newborn star's 'heartbeat' seen by X-ray telescopes

Using a combination of modern physics tools--including three-dimensional, high-resolution X-ray, radiocarbon dating with accelerator mass spectrometry, and infrared spectroscopy--the researchers analysed the tooth to determine the age and composition of a resinous filling detected inside.

UNESCO: Basic Sciences

The AR0835HS is currently sampling in a new 10mm x 10mm CLCC package and will be available in mass production CY Q1 2013.

ENGADGET: Aptina intros 8MP sensors that bring 60 fps, pro-grade video to phones, action cameras