Happy Mother’s Day!
To the mothers who inspire greatness in their children, today we celebrate you. Happy Mother’s Day to the dedicated Moms who make every second count. Mechanical PE Exam Prep That WorksPay Up Front and Save $100! Test Drive Your Course for Only $50! Pay-As-You-Go and Start for Only $50! Don’t miss out on the latest […]
Congratulations To All Graduating Engineers Who Will Shape The Future!
Attention all graduating engineers! As you embark on your journey into the professional world, remember: the key to success lies in meticulous planning. Whether you dream of designing innovative systems or advancing engineering technology, becoming a professional engineer requires strategic steps and foresight. Join us in exploring the ins and outs of this exciting path […]
A “Cheddar” Way of Saving Energy for a Cheese Manufacturer
Barbers, a cheesemaker in the UK installed a milk-source heat pump on the process and is now saving £70,000 (about $94,000) in electrical costs per year. The system recovers the heat removed when cooling the raw milk from a cow’s body temperature to 40°F (5°C) for storage until the next step. Unlike a plain heat […]
Master Rolling Wheel Kinematics Once And For All
Watch our video! Kinematics is the study of the geometry of motion. Of the most common of moving objects, the rolling wheel is probably the most studied. This presentation shows how the velocity of particular points on a rolling wheel are determined using the relative motion equation. The most important aspect of the relative motion […]
Zero-force Members
Watch our video! Zero-force members are associated with idealized trusses where all the members of the truss are two-force members. This means the members are connected only by pins, only loaded at these pin connections, and are in either tension or compression. However, some of the members of the truss may have zero force acting […]
“DTC Is Worth Its Weight in Gold!”
At Dr. Tom’s Classroom, we have worked hard to make our courses the absolute best preparation for the Mechanical PE Exams. We strive to keep our courses as affordable as possible. We know that purchasing a PE Exam prep course is a major investment, and we want to make sure that your investment pays off […]
Heat Islands not Just a City Thing
We’ve all heard about the heat island effect around large cities. Concrete, buildings, and asphalt absorb solar radiation and then re-emit it to the air. It makes cities a few degrees warmer, particularly on sunny days. But the same effect happens around data centers too. Data centers often draw hundreds of megawatts of electricity, and […]
FEATURED TESTIMONIAL – “Dr. Tom Does a Sterling Job”
“If it wasn’t for Dr Tom’s encouraging and clarifying teaching style, I doubt I’d ever have the courage take on the Thermal and Fluids Systems PE exam. In fact, Thermodynamics and Heat Transfer were the areas in which I was struggling the most in college, some twenty years ago. Dr Tom’s course made these ‘difficult’ […]
Learn to Solve Dynamics Problems Correctly
Watch our video! This presentation looks at the classic motion of a vehicle moving along a level road, where it could be speeding up or slowing down. In the example presented, the vehicle is slowing down due to its brakes, and in fact, we are told the wheels lock up. What is required in the […]
Making Heat Pumps Better with a Common Ingredient
Heat pumps are a great way to use the power (and heat) of thermodynamics to move heat from a cold space to a hot space. Their Coefficient of Performance (COP) makes them a better option than fossil fuels in some climates. Renewable energy like solar, can also reduce the carbon footprint. However, the biggest problem […]
