U-tube: the glass tube and piezoelectric speaker that were used to create the new mass sensor. (Courtesy: William Grover) A $12 device that can measure the mass of microgram-sized objects in fluid has ...

At the end of the 18th century, the British scientist Henry Cavendish measured the force of gravity between two objects for the first time in a laboratory. The objects in question were lead balls, one ...

A gram is a standard unit of measurement. It is a word used to describe the mass of an object. You record the mass of light objects in grams. One way to measure the mass of objects is to use balance ...

In science, there are thousands of ways to measure the world around us that the average person may never encounter. For example: Pascals to measure pressure, Candles to measure light intensity, and ...

It is tempting to think that some materials are always heavier than other materials. For example, someone might say that metal is heavier than air. But it depends on how much of each material there is ...

This is a good question, and also a good reminder to be careful with one’s language when writing about physics! Most of the time, if you’re reading an article, what we mean by mass and rest mass is ...

In 1915 Einstein came up with his theory of relativity which tells us that massive objects warp space. Four years later British astronomer Sir Arthur Eddington was able to prove this theory true by ...

The breakthrough measurement of the white dwarf LAWD 37 made with Hubble gives us a hint of how the sun will look at the end of its life. When you purchase through links on our site, we may earn an ...

Dark matter is an enigmatic form of matter not expected to emit light, yet it is essential to understanding how the rich tapestry of stars and galaxies we see in the night sky evolved. As a ...