Day and Night World Clock - Wolfram Demonstrations Project

Day and Night World Clock - Wolfram Demonstrations Project: See local times around the world according to Coordinated Universal Time. Understand the position of the Sun and the lengths of day and night across the year. Local time zone is automatically determined by the system clock time zone. Click get local time to retrieve current system time and compute UTC accordingly.;

Daylight Calculator - Wolfram Demonstrations Project

Daylight Calculator - Wolfram Demonstrations Project: This Demonstration shows the hours of daylight for a given latitude and the night and daylight halves of the globe for a given date and time.;

Hourglass - Wolfram Demonstrations Project

Hourglass - Wolfram Demonstrations Project: The hourglass is a simple device many centuries old used to measure short intervals of time. Sand or some similar material is allowed to drop from one glass vessel to another. These vessels are connected by a thin neck. The device is calibrated so that the sand passes into the lower vessel in a certain period of time. This Demonstration simulates how an hourglass works for a selected time peri;;

Universal Sundial - Wolfram Demonstrations Project

Universal Sundial - Wolfram Demonstrations Project: In a horizontal sundial the angle of the gnomon the brown triangle is equal to the latitude For a given latitude the distribution of the hourlabeled lines is invariant whatever the day of the year however sunrise and sunset times change during the year due to the change in declinationThe sundial is oriented toward North in the Northern Hemisphere and toward South in the Southern HemisphereEnter

Abacus - Wolfram Demonstrations Project

Abacus - Wolfram Demonstrations Project: An abacus computes numbers by sliding beads on rods. In this Demonstration click a bead to move it. The upper disks add 5. Thus each row can store the digits between 0 and 9.;

Simple Programs in Turtle Geometry - Wolfram Demonstrations Project

Simple Programs in Turtle Geometry - Wolfram Demonstrations Project: This Demonstration explores simple programs in turtle geometry, where an unseen turtle moves and traces a path according to provided instructions. If only one move-turn pair is used, the size of the forward step will have no affect on the image. As an example, to draw a pentagon of side length 10, use one move-turn pair with 5 repetitions and set

Ray Diagrams for Microscope and Telescope - Wolfram Demonstrations Project

Ray Diagrams for Microscope and Telescope - Wolfram Demonstrations Project: This Demonstration shows the linear magnification for a pair of lenses such as in a microscope or telescope.

Ray Diagrams for Lenses - Wolfram Demonstrations Project

Ray Diagrams for Lenses - Wolfram Demonstrations Project: This Demonstration lets you visualize the ray diagrams for converging and diverging lenses. By manipulating the object and lens locations, you can create real or virtual images. The rays parallel to the principal axis and the ray through the center of the lens are drawn.Locators allow you to drag both the object and the lens. You can change the focal length using a slider. The degree of magnificat

Magnetic Circuits - Wolfram Demonstrations Project

Magnetic Circuits - Wolfram Demonstrations Project: In this Demonstration you can see the current in a ferromagnetic core with an air gap wrapped by a wire. The example calculates the reluctance total flux and mean path length in a three-dimensional representation. The magnetic circuit is created in a similar form to what would be needed by an electric motor. You can adjust the number of wire wraps and geometry of the system to see the affects on;

AC Transformers - Wolfram Demonstrations Project

AC Transformers - Wolfram Demonstrations Project: An electrical transformer is a device to change the voltage and amperage of alternating currents In the simple design shown here primary wire coils blue and secondary coils red are wound around a ferromagnetic core An alternating current in the primary circuit creates a timedependent magnetic field in the core which in turn induces an alternating current in the secondary circuit via Faradays law o

Galvanometer as a DC Multimeter - Wolfram Demonstrations Project

Galvanometer as a DC Multimeter - Wolfram Demonstrations Project: In a DArsonval galvanometer a disk wound with many turns of fine wire can rotate in the field of a permanent magnet its deflection proportional to the current through the wire. A coil spring (not shown) provides a restoring torque to the disk. As part of an appropriate circuit the galvanometer can function as a DC multimeter measuring the voltage current or resistance of a connected circuit;;

Resistors in Series - Wolfram Demonstrations Project

Resistors in Series - Wolfram Demonstrations Project: The current in a circuit can be calculated by using Ohms law voltage equals resistance times current In symbols In this simple circuit the two resistors are in series so the effective resistance The current is then No current flows when the circuit is open

Reflection and Refraction on a Flat Surface between Two Different Materials - Wolfram Demonstrations Project

Reflection and Refraction on a Flat Surface between Two Different Materials - Wolfram Demonstrations Project: When a ray of light hits the surface between two different materials part of it is reflected and part of it is refracted through the second material Call the angle between the incoming ray and the normal to the surface The angle of reflection is while the angle of refraction is satisfying where and are the ratios between the speed of light in a vacuum and in the materials and There is no refle

Refraction through Parallel Faces - Wolfram Demonstrations Project

Refraction through Parallel Faces - Wolfram Demonstrations Project: A ray of light passes through the air yellow to a glass plate blue and then back into the air By Snells law the angles of refraction at the first and second surfaces are equal and therefore the entry and exit rays are parallel

Laws of Reflection - Wolfram Demonstrations Project

Laws of Reflection - Wolfram Demonstrations Project: See how the laws of reflection work: (1) the incident and the reflected rays (both yellow) and the normal (orange) to the surface of reflection all lie in the same plane; and (2) the angle of the incident ray is equal to the angle of the reflected ray; in symbols .;;

Replay 10 Great Chess Games - Wolfram Demonstrations Project

Replay 10 Great Chess Games - Wolfram Demonstrations Project: Select and replay any of 10 great chess games Graphics and PGN parsing logic are all in easytoreuse Wolfram Language code The FEN string beneath the graphic can be copied and then pasted into a computer chess engine eg Stockfish for further analysis of chess positions

Inhibition of Enzyme Reactions in Continuous Stirred-Tank Reactor and Batch Reactor - Wolfram Demonstrations Project

Inhibition of Enzyme Reactions in Continuous Stirred-Tank Reactor and Batch Reactor - Wolfram Demonstrations Project: Inhibitors decrease the rates that enzymes bind to substrates and convert them to products Three types of inhibition competitive uncompetitive noncompetitivemixed and reaction with no inhibitor are compared for an enzyme reaction that obeys MichaelisndashMenten kinetics Substrate concentration is plotted versus time for a continuous stirredtank reactor CSTR and for a batch reactor Change the inhib

Batch Reactors at Constant Volume or Constant Pressure - Wolfram Demonstrations Project

Batch Reactors at Constant Volume or Constant Pressure - Wolfram Demonstrations Project: Fractional conversion versus dimensionless time is plotted for an irreversible gasphase reaction in two isothermal batch reactors Both reactors start at the same initial conditions but one is at constant volume and the other is at constant pressure Select the final conversion in both reactors with a slider Use sliders to change the stoichiometric coefficient and the reaction order If the reaction

Reactor with Recycle Stream - Wolfram Demonstrations Project

Reactor with Recycle Stream - Wolfram Demonstrations Project: Mass balances are demonstrated for a reactor system Pure is fed to the system and two parallel reactions take place in the reactor desired undesiredA separation unit after the reactor removes some of the unreacted and recycles it back to the feed stream Use a slider to set the recycle ratio which is the ratio of the recycle flow rate to the fresh feed flow rate Set the reactor selectivity which is

Calculations for Reduced Carbon Emissions - Wolfram Demonstrations Project

Calculations for Reduced Carbon Emissions - Wolfram Demonstrations Project: This Demonstration considers the present level of carbon emissions (CO_2) for a city of selected population and the possible reduction of emissions up to the year 2050. Various strategies for effectiv

Magic Squares from Latin Squares - Wolfram Demonstrations Project

Magic Squares from Latin Squares - Wolfram Demonstrations Project: In a magic square the rows columns and two major diagonals have the same sumThis Demonstration displays magic squares created by combining pairs of Latin squares randomly constructed from the templates designed by John R Hendricks 1

The Principle of Archimedes - Wolfram Demonstrations Project

The Principle of Archimedes - Wolfram Demonstrations Project: A gold sphere is submerged in water It is suspected that the center might be empty or made of some lighter material According to Archimedess principle we can determine the volume of the inner sphere by measuring the difference between the weight of the entire sphere in and out of water that difference must be equal to the buoyant force the weight of the volume of water displaced Then the differenc

Forces in a Power Tower Truss - Wolfram Demonstrations Project

Forces in a Power Tower Truss - Wolfram Demonstrations Project: The method of joints is used to solve for the member forces and reaction forces on a power tower truss. Use sliders to set the point load forces at joints and and check show joint labels to see the labeled joints. This truss rests on two pinned supports which resist both vertical and horizontal forces. Member forces are shown in kN. Arrows that point outward (green) represent the member respo;;

Determine the Type of Stress in Each Member of a Truss - Wolfram Demonstrations Project

Determine the Type of Stress in Each Member of a Truss - Wolfram Demonstrations Project: Based on your understanding of force balances guess whether a selected member of the truss is under compression under tension or is a zero member. Set the diagonal and vertical point loads with sliders. The reaction forces (blue) are calculated and displayed on the truss. Select guess force on a member use the popup menu select a member (from 1 to 13) and then select compression tensi;

Method of Sections to Solve a Truss - Wolfram Demonstrations Project

Method of Sections to Solve a Truss - Wolfram Demonstrations Project: This Demonstration solves a truss using the method of sections which involves cutting along several selected members and taking the sum of the forces forces and moment about a pointSelect solve for reaction forces to see how the reaction forces and are calculated Use buttons to calculate the moment about do a force balance and see the solved forces When calculate moment is selected move the mouse

Simple Stair Calculator - Wolfram Demonstrations Project

Simple Stair Calculator - Wolfram Demonstrations Project: Traditionally stairs are one of the most painful parts of a building. This Demonstration calculates stairwell length, the length of the total run of the stairs, and the number of steps. It takes into account legal minimum headroom requirements, the thickness of the finished floor, and total floor-to-finished-floor height (also called the

Ventilation in multistoried building

Inhibition of Enzyme Reactions in Continuous Stirred-Tank Reactor and Batch Reactor - Wolfram Demonstrations Project

Inhibition of Enzyme Reactions in Continuous Stirred-Tank Reactor and Batch Reactor - Wolfram Demonstrations Project: Inhibitors decrease the rates that enzymes bind to substrates and convert them to products Three types of inhibition competitive uncompetitive noncompetitivemixed and reaction with no inhibitor are compared for an enzyme reaction that obeys MichaelisndashMenten kinetics Substrate concentration is plotted versus time for a continuous stirredtank reactor CSTR and for a batch reactor Change the inhib

Reaction in an Adiabatic Continuous Stirred-Tank Reactor - Wolfram Demonstrations Project

Reaction in an Adiabatic Continuous Stirred-Tank Reactor - Wolfram Demonstrations Project: In this Demonstration a liquidphase reaction takes place in an adiabatic continuous stirredtank reactor CSTR Select an exothermic reaction and then select the feed concentration of the limiting reactant and the volumetric flow rate Mass and energy balances are solved to determine the outlet reactant concentration and temperature The color of the fluid in the reactor is correlated with the reactor

Regular Polygons of Edge Length Two - Wolfram Demonstrations Project

Regular Polygons of Edge Length Two - Wolfram Demonstrations Project: Consider a regular n-gon where the edges have length two. Draw a perpendicular bisector on one edge and split it by the diagonals perpendicular to it. Then the sum of the squares of the lengths equals

Generating Arithmetic Expressions - Wolfram Demonstrations Project

Generating Arithmetic Expressions - Wolfram Demonstrations Project: This Demonstration generates arithmetic expressions with numbers up to 20.;;

Pocket Calculator - Wolfram Demonstrations Project

Pocket Calculator - Wolfram Demonstrations Project: This Demonstration simulates a simple pocket calculatorMC clear memory MR recall number stored in memory MS store number in memory M add number to memory Clear set displayed number to zero CE abandon operation and set displayed number to zero change sign of number add two numbers eg 5 4 9 subtract two numbers eg 5 4 1 times multiply two numbers eg 5 times 2 10 calculate percentage eg 50 t

Illustrating Arithmetic with Graphic Arrays - Wolfram Demonstrations Project

Illustrating Arithmetic with Graphic Arrays - Wolfram Demonstrations Project: This Demonstration illustrates simple arithmetic expressions of the type represented graphically as arrays of dots or playing-card pips.;;

Balancing lever with four weights

Wolfram basic example

wolfram cloud notebook