Orders of magnitude (time)

Second

The second (symbol: s) is the unit of time in the International System of Units (SI), historically defined as 1⁄86400 of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds each (24 × 60 × 60 = 86400). The current and formal definition in the International System of Units (SI) is more precise: The second [...] is defined by taking the fixed numerical value of the caesium frequency, ΔνCs, the unperturbed ground-state hyperfine transition frequency of the caesium 133 atom, to be 9192631770 when expressed in the unit Hz, which is equal to s−1. This current definition was adopted in 1967 when it became feasible to define the second based on fundamental properties of nature with caesium clocks. Because the speed of Earth's rotation varies and is slowing ever so slightly, a leap second is added at irregular intervals to civil time to keep clocks in sync with Earth's rotation. (Wikipedia).

Second
Video thumbnail

What is a second: from fizzics.org

The second is the International base unit of time but how is it defined? Here is an explanation.

From playlist Units of measurement

Video thumbnail

A12 Changing the notation

Changing notation with complex eigenvalues.

From playlist A Second Course in Differential Equations

Video thumbnail

Second Derivative of Vector-Valued Function Example 2

Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Second Derivative of Vector-Valued Function Example 2

From playlist Calculus

Video thumbnail

Second Derivative of Vector-Valued Function Example 1

Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Second Derivative of Vector-Valued Function Example 1

From playlist Calculus

Video thumbnail

A03 Eigenvalues

The method of determining eigenvalues as part of calculating the sets of solutions to a linear system of ordinary first-order differential equations.

From playlist A Second Course in Differential Equations

Video thumbnail

A01 Introduction to linear systems

An introduction to linear sets of ordinary differential equations.

From playlist A Second Course in Differential Equations

Video thumbnail

Physics - Thermodynamics: (2 of 14) What is the Second Law of Thermodynamics? (No 100% Efficiency)

Visit http://ilectureonline.com for more math and science lectures! In this video I will explain the 2nd Law of Thermodynamics (no 100% efficiency).

From playlist PHYSICS - THERMODYNAMICS

Video thumbnail

2nd Order Differential Equation The Characteristic Equation

We demonstrate how to solve a 2nd order, linear, homogeneous differential equation with constant coefficients with "guess and check," and the characteristic equation.

From playlist Mathematical Physics I Uploads

Video thumbnail

Understanding Second Law of Thermodynamics !

The ‘Second Law of Thermodynamics’ is a fundamental law of nature, unarguably one of the most valuable discoveries of mankind; however this law is slightly confusing for most engineers or students. The main reason for this is because it has so many complex terms in it and that there are ma

From playlist Thermal Engineering

Video thumbnail

Given the 2nd Derivative of a Vector Function, Find the Components of r'(t) and r(t)

This video explains how to find the components of a vector function and the components of the derivative of a vector function given the components of the 2nd derivative. http://mathispower4u.com

From playlist Vector Valued Functions

Video thumbnail

Velocity-Time Graphs | Revision for Maths and Physics GCSE and iGCSE

I want to help you achieve the grades you (and I) know you are capable of; these grades are the stepping stone to your future. Even if you don't want to study science or maths further, the grades you get now will open doors in the future. Get exam ready for GCSE Maths https://primrosekitt

From playlist Edexcel Physics Paper 1 | Revision Playlist for Combined and Separate Science GCSE

Video thumbnail

Physics 2 - Motion In One-Dimension (13 of 22) Free Fall: Conceptual Approach

Visit http://ilectureonline.com for more math and science lectures! In this video I will explain the conceptual approach of an object in free-fall.

From playlist PHYSICS - MECHANICS

Video thumbnail

Accelerated Motion

Acceleration is a critical concept. Confusion on the topic can trouble a Physics student for most the course. No need to be troubled. Let this Physics Classroom video shed light on the topic with clear instruction, informative graphics, numerous examples, worked-out problems, and an action

From playlist Kinematics Video Tutorial Series

Video thumbnail

Plotting projectile displacement, acceleration, and velocity | Khan Academy

Plotting projectile displacement, acceleration, and velocity as a function to change in time. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/one-dimensional-motion/kinematic-formulas/v/projectile-height-given-time?utm_source=YT&utm_medium=Desc&utm_

From playlist One-dimensional motion | AP Physics 1 | Khan Academy

Video thumbnail

Kinematics, What Does Meters per Second Squared Mean? (Best Explanation Ever)

Explains what is meant by "meters per second squared". This is the unit for acceleration which is defined as the rate of charge of velocity. Acceleration tells you how much an object's velocity each second. Social Media for Step by Step Science: Teacher Pay Teachers Store: https://tinyur

From playlist Kinematics; One Dimensional Horizontal Motion

Video thumbnail

Physics - Acceleration & Velocity - One Dimensional Motion

This physics video tutorial explains the concept of acceleration and velocity used in one-dimensional motion situations. Acceleration tells you how fast the velocity is changing every second while velocity tells how fast the position is changing per second. This video provides all of the

From playlist New Physics Video Playlist

Video thumbnail

Understanding Instantaneous and Average Velocity using a Graph

Students often get confused by the difference between Instantaneous and Average. In this video we use a graph to compare and understand the two different concepts. 0:00 Intro 0:28 Defining Instantaneous and Average Velocity 0:52 Examples of Each 2:23 The Graph 2:42 Walking the Graph (my

From playlist Motion in One Dimension - AP Physics 1

Video thumbnail

A05 Explanation of the matrix format of a system of linear differential equations

Explanation of the matrix notation used in systems of linear differential equations.

From playlist A Second Course in Differential Equations

Video thumbnail

Physics - Basic Introduction

This video tutorial provides a basic introduction into physics. It covers basic concepts commonly taught in physics. Access The Full 1 Hour 42 Minute Video on Patreon: https://www.patreon.com/MathScienceTutor Annual Membership - Save 15%: https://www.patreon.com/join/MathScienceTutor

From playlist New Physics Video Playlist

Related pages

Hour | Nanosecond | Metre | Metric prefix | Hertz | Becquerel | Femtosecond | Sidereal year | Attosecond | Carl Friedrich Gauss | Time | Millisecond | Day | Leap year | Radian | Steradian | Frequency | Rydberg constant | Julian year (astronomy) | Orders of magnitude (time) | Christiaan Huygens | Microsecond | Mole (unit) | Seconds pendulum | Time metrology | Ampere | Al-Biruni | Minute | Kilogram | Sexagesimal | Picosecond | Candela | SI prefix | Speed of light