If something seems light for its size (like a bag of cotton or pumice rock), then we say it has low density. Mass is the amount of matter in an object. Volume is how much space the object takes up.

Students will be able to explain that the density of a liquid has to do with how heavy it is for the sample size. Students will also be able to explain that if a liquid is more dense than water, it ...

For the first time, scientists have found that electric sparks can be guided using ultrasonic waves. A recent study by ...

we have made significant improvements beyond what is presented in the figure and can now perform periodic hybrid DFT calculations for systems with 5000 basis sets on a laptop with only 32 GB of memory ...

But why, you might ask, might it be adaptive for a plant to control its rates of water loss and CO 2 uptake? One answer can be found in the sun. Generally, plant photosynthetic apparati are only ...

Density describes how closely packed the particles are in a solid, liquid or gas. There is little difference between the density of a liquid and its corresponding solid (eg water and ice). This is ...

We are developing data assimilative approaches for specification and forecasting of thermospheric mass density using an ensemble Kalman filter in collaboration with NCAR. A promising research ...