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Related Concept Videos

Rocket Propulsion in Empty Space - I01:13

Rocket Propulsion in Empty Space - I

The driving force for the motion of any vehicle is friction, but in the case of rocket propulsion in space, the friction force is not present. The motion of a rocket changes its velocity (and hence its momentum) by ejecting burned fuel gases, thus causing it to accelerate in the direction opposite to the velocity of the ejected fuel. In this situation, the mass and velocity of the rocket constantly change along with the total mass of ejected gases. Due to conservation of momentum, the rocket's...
Transmission-based Precautions II: Airborne and Protective Environment01:25

Transmission-based Precautions II: Airborne and Protective Environment

Transmission-based precautions are for patients infected or suspected to be infected (or colonized) with organisms posing a significant risk to others. The transmission precautions include airborne and protective environment precautions.
Airborne precautions:
Use airborne precautions when treating patients known or suspected to have diseases that spread through the air—for example, tuberculosis or measles. These organisms are present in smaller droplets expelled by an infected person and...
Rocket Propulsion In Empty Space - II01:12

Rocket Propulsion In Empty Space - II

The motion of a rocket is governed by the conservation of momentum principle. A rocket's momentum changes by the same amount (with the opposite sign) as the ejected gases. As time goes by, the rocket's mass (which includes the mass of the remaining fuel) continuously decreases, and its velocity increases. Therefore, the principle of conservation of momentum is used to explain the dynamics of a rocket's motion. The ideal rocket equation gives the change in velocity that a rocket experiences by...
Real-World Applications of Space Curves01:29

Real-World Applications of Space Curves

Modern aerospace navigation depends on the accurate prediction of motion in three-dimensional space. In defense applications, radar systems continuously track both interceptors and moving aerial targets to find whether their flight paths will result in a collision. These motions are modeled mathematically as space curves, which represent paths that change continuously with time. Each object’s position is described by a vector function that specifies its location in terms of time-dependent...
Acceleration due to Gravity on Other Planets01:24

Acceleration due to Gravity on Other Planets

The gravitational acceleration of an object near the Earth's surface is called the acceleration due to gravity. It can be measured by conducting simple experiments on Earth. However, such an experiment is impossible to conduct on the surface of other planets.
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Principle of Equivalence

According to Albert Einstein (1897-1955), free-falling and feeling weightless are intrinsically linked. If a person were in free-fall under gravity, for example, diving towards the Earth from an airplane, they would feel completely weightless. Similarly, a person descending in a lift may feel partially weightless. Broadly speaking, it is assumed that an object in a uniform gravitational field and an object undergoing constant acceleration in the absence of gravity are under the same...

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Related Experiment Video

Updated: Jun 25, 2026

Exploring the Effects of Spaceflight on Mouse Physiology using the Open Access NASA GeneLab Platform
11:08

Exploring the Effects of Spaceflight on Mouse Physiology using the Open Access NASA GeneLab Platform

Published on: January 13, 2019

[The countermeasure system for extended space flights].

I B Kozlovskaia, I D Pestov, A D Egorov

    Aviakosmicheskaia I Ekologicheskaia Meditsina = Aerospace and Environmental Medicine
    |February 26, 2009
    PubMed
    Summary

    This study details Russian countermeasures developed for long-term space flight (SF), including exercise and specialized suits. These methods effectively mitigated negative physiological effects during missions aboard Salyut and Mir orbital stations.

    Area of Science:

    • Biomedical science
    • Space medicine
    • Human physiology

    Context:

    • Long-term space missions pose significant physiological challenges to astronauts.
    • Previous countermeasures were insufficient for extended durations in microgravity.

    Purpose:

    • To summarize the development and efficacy of a comprehensive countermeasure system for long-duration space flight.
    • To present findings from investigations at the Institute for Biomedical Problems.

    Summary:

    • A Russian countermeasure system, developed under O.G. Gazenko, successfully supported long-term space flights (64-438 days) on Salyut and Mir.
    • The system includes physical exercises (treadmill, veloergometer), axial loading (Pinguin suit), and negative body pressure (Chibis suit).
    • This integrated approach proved highly effective in preventing or alleviating adverse effects of microgravity.

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    Reduced-gravity Environment Hardware Demonstrations of a Prototype Miniaturized Flow Cytometer and Companion Microfluidic Mixing Technology

    Published on: November 13, 2014

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    Last Updated: Jun 25, 2026

    Exploring the Effects of Spaceflight on Mouse Physiology using the Open Access NASA GeneLab Platform
    11:08

    Exploring the Effects of Spaceflight on Mouse Physiology using the Open Access NASA GeneLab Platform

    Published on: January 13, 2019

    Optimization, Test and Diagnostics of Miniaturized Hall Thrusters
    12:22

    Optimization, Test and Diagnostics of Miniaturized Hall Thrusters

    Published on: February 16, 2019

    Reduced-gravity Environment Hardware Demonstrations of a Prototype Miniaturized Flow Cytometer and Companion Microfluidic Mixing Technology
    13:59

    Reduced-gravity Environment Hardware Demonstrations of a Prototype Miniaturized Flow Cytometer and Companion Microfluidic Mixing Technology

    Published on: November 13, 2014

    Impact:

    • Ensured successful completion of extended missions, paving the way for future deep space exploration.
    • Demonstrated the viability of robust physiological countermeasures for human spaceflight.
    • Provided a foundation for current and future space medicine protocols.