Author Archives: George Tafari

ENERGY AND MOMENTUM: Which Object Will Roll Down a Hill More Rapidly?

If a buggy and a sphere of equal masses begin rolling side-by-side down a hill, which will reach the bottom of the hill first ( neglecting wind resistance ) ? For simplicity, we should pretend that the energy transfer in this problem is 100% efficient: no losses occur due to sound, random vibrations, or windContinue reading “ENERGY AND MOMENTUM: Which Object Will Roll Down a Hill More Rapidly?”

MATHEMATICS: Radius, Radians, Diameter, Circumference, and ” Pi ” = 3.14

C = 2πR.  What does this mean?  What is its usefulness?  C = The distance around any circle.  But where did such a formula come from?  Start by drawing a circle.  Within the middle of the circle, draw a dot.  Now, draw a line that passes through the dot.  This line should divide the circleContinue reading “MATHEMATICS: Radius, Radians, Diameter, Circumference, and ” Pi ” = 3.14″

ELECTRICITY: Direct Current and Parallel Resistors

INTRODUCTION TO DIRECT CURRENT ( DC ) ELECTRONICS : Note: Assuming each resistor ( R ) = 64 Ohms, what is the equivalent resistance of the circuit from points A to B ? Symmetry regarding the flow of electrons is the key to calculating the total resistance ( R ) of this circuit. Let’s suppose theContinue reading “ELECTRICITY: Direct Current and Parallel Resistors”

ELASTIC COLLISIONS: Kinetic Energy, Momentum, Two Equations, and Two Unknown Variables

If a + b = c, and if b = e + f, then it’s also true that a + e + f = c. Any time a variable is common to two or more similar equations, solving one of the two equations will enable us to substitute the common variable into the remaining equation.Continue reading “ELASTIC COLLISIONS: Kinetic Energy, Momentum, Two Equations, and Two Unknown Variables”

GAS LAWS: Boltzmann’s Constant

In previous circumstances, a known quantity of an ideal gas in moles ( n ) was shown to influence a volume of space in accordance with the Ideal Gas Law ( PV = nRT ). It is useful, however, to be able to determine the number of molecules ( N ) of a gas thatContinue reading “GAS LAWS: Boltzmann’s Constant”

MATHEMATICS: Binary Math and Digital Electronics

Write the numbers 8,4,2, and 1 in descending order.  We will form binary numbers by choosing the numbers from this list that are needed to form the binary number wanted.  Below, we will see how we use the number 1 to choose which number out of the ( 8,4.2,1 ) sequence is being used toContinue reading “MATHEMATICS: Binary Math and Digital Electronics”

ELECTRICITY: Kirchhoff’s Rules and Negative Current Values

Voltage, where V = IR, is the product of the current ( I ) of Amperes in an electrical circuit in units of coulombs per second ( q/s ), and resistance ( R ) in Ohms. Likewise, voltage is defined as the amount of energy in Joules ( J ) a coulomb of charge carriesContinue reading “ELECTRICITY: Kirchhoff’s Rules and Negative Current Values”

THE STOCK MARKET: Electric Vehicle and Drone Investing.

ELECTRIC VEHICLE AND DRONE INVESTING: Only 2% of vehicles are electric and autonomous. An even smaller percentage of drones are used for delivery and logistics purposes. The following companies may benefit from these trends. Zebra Technologies ( ZBRA ): ” Some warehouses are turning to autonomous vehicles to bring merchandise to sortation and packing areas.Continue reading “THE STOCK MARKET: Electric Vehicle and Drone Investing.”

THE STOCK MARKET: Green Energy and Cryptocurrency Mining.

GREEN ENERGY COMPANIES WILL PROVIDE POWER TO BLOCKCHAIN’S CRYPTOCURRENCY MINING TECHNOLOGICAL NETWORKS. Notable companies in the clean energy space include Solar Edge ( SEDG ), Brookfield Renewable Partners ( BEP ), Array Technologies ( ARRY ), First Solar ( FSLR ), Plug Power ( PLUG ), Nextera Energy ( NEE ), Albermarle ( ALB )Continue reading “THE STOCK MARKET: Green Energy and Cryptocurrency Mining.”