Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Capillary-inertial colloidal catapult upon drop coalescence on a particle of intermediate wettability. With the symmetric configuration depicted, the coalescence process only produces net momentum in the vertical direction. The blue (dark) arrow denotes the force exerted on the merged drop by the solid particle, and the purple (light) arrow denotes the counter force on the particle.
