Merry-go-round
Merry-go-round - Related Videos
11:09
Online Size-exclusion and Ion-exchange Chromatography on a SAXS Beamline
0 Views •
Cited by 40 •
2017
The determination of the solution structure of a protein by small angle X-ray scattering (SAXS) requires monodisperse samples. Here, we present two possibilities to ensure minimal delays between sample preparation and data acquisition: online size-exclusion chromatography (SEC) and online ion-exchange chromatography (IEC).
08:50
Total Internal Reflection Absorption Spectroscopy (TIRAS) for the Detection of Solvated Electrons at a Plasma-liquid Interface
0 Views •
Cited by 9 •
2018
This article presents a total internal reflection absorption spectroscopy (TIRAS) method for measuring short-lived free radicals at a plasma-liquid interface. In particular, TIRAS is used to identify solvated electrons based on their optical absorbance of red light near 700 nm.
07:47
Anti-virulent Disruption of Pathogenic Biofilms using Engineered Quorum-quenching Lactonases
0 Views •
Cited by 7 •
2016
Quorum-quenching enzymes are anti-virulent and anti-bacterial options that can mitigate pathogenesis without risk of incurring resistance, by preventing the expression of virulence factors and genes associated with antibiotic resistance and biofilm formation. In this study, we report a method that demonstrates the efficacy of quorum-quenching enzymes in bacterial biofilm disruption.
11:43
Advanced Animal Model of Colorectal Metastasis in Liver: Imaging Techniques and Properties of Metastatic Clones
0 Views •
Cited by 6 •
2016
The ability of metastatic clones to colonize distant sites depends on their proliferation capacity and/or their ability to survive in the host microenvironment without significant proliferation. Here, we present an animal model that allows quantitative visualization of both types of liver colonization by metastatic clones.
FAQs
Rotation continues through the interaction of applied torque, friction, and structural forces. A motor or external push supplies torque that changes or maintains the platform’s rotational motion, while friction resists that motion. Structural forces help support the rotating platform and its riders, making the merry-go-round a useful system for examining how competing forces affect rotation.
A rider farther from the central axis travels along a larger circular path during each rotation. For the same angular motion, that position changes the rider’s linear motion and affects the inward centripetal acceleration required to follow the path. Moving riders inward or outward therefore provides a direct way to examine how radius influences circular-motion requirements.
Moving riders changes the platform’s rotational inertia, which describes how strongly the system resists changes in its rotation. Riders placed farther from the axis contribute more to that resistance than riders positioned closer to it. Consequently, the torque and energy required to change the ride’s speed depend not only on the total mass but also on its distribution.
A basic investigation can compare the ride’s behavior at different speeds and with different rider distributions. Observing how applied force changes rotation, then relating those changes to torque, rotational inertia, and angular momentum, reveals how the system responds. This approach also allows friction and energy requirements to be considered alongside idealized circular-motion relationships.
From the rotating frame, a rider experiences an apparent outward effect while moving around the platform. In an external frame, the required force is described as an inward centripetal force that continually redirects the rider’s motion. Comparing these viewpoints helps students distinguish physical interaction from effects introduced by describing motion within a rotating reference frame.
The system connects circular motion with torque, angular velocity, centripetal acceleration, rotational inertia, friction, energy, and conservation laws. Students can examine how speed changes affect motion and how relocating riders changes angular momentum and the energy needed for rotation. These observations make abstract rotational principles accessible through a familiar mechanical system.