The Engineering Prophecies

Behold! The next evolution in Apple's "planned obsolescence" strategy - a screw that requires you to buy a $299 "Apple Certified Screwdriver Pro" with a proprietary head shape. Because regular screws are just too mainstream for the company that made you throw away all your headphones. Next up: Apple will patent the circle and charge licensing fees for wheels.

Remember when engineers were bold visionaries ready to conquer the laws of physics? Now they're just whimpering at the sight of a thermodynamics textbook. The left shows the muscular "Engineers then" Doge, full of ambition and delusions of grandeur, while the right displays the pathetic reality of modern engineering students. As someone who's taught thermodynamics for 20 years, I can confirm this transformation happens approximately 3 weeks into the semester when they realize entropy isn't just a fancy word but an actual mathematical concept. The dreams of building iron-man suits quickly dissolve into desperate Google searches for "how to pass thermo without understanding it."

Content Me panic-reviewing gas law calculations at 2 AM for my 7 AM exam. Because n is constant, we can use Equation 10.8. Solve: Rearranging Equation 10.8 to solve for V2 gives ½ = 4 x - (6.0 L) 1.0 atm /252 K 295 K, = 11L 0.45 atm/ check: The result appears reasonable. Notice that the felt temperatures moles, fits the initial voltaebya ratio of pressures endle volume connect sim, the expect that alecreasing pressure will cause the yetuense. increase Sintany, we expect that decre sion id cause the volume to decrease afore st at the dister. in pressures is raote aramatic than the difference in temperateres Thus, we shag expect the effect of the pressure change to predominate in determining the final yo. ume, as it does. PRACTICE EXERCISE A 0.50-mol sample of oxygen gas is confined at 0 °C in a cylinder with a morade piston, such as that shown in Figure 10.12. The gas has an initial pressure of 10 at. The piston then compresses the gas so that its final volume is halt the initial volume The final pressure of the gas is 2.2 atm. What is the final temperature of the gas in degrees Celsius? 10.5 FURTHER APPLICI OF THE IDEAL-GAS EQUATION The ideal-gas equation can be used to determine many relationships involving the physical properties of gases. In this section we use it first to define the rela tionship between the density of a gas and its molar mass, and then to calculate the volumes of gases formed or consumed in chemical reactions Gas Densities and Molar Mass The ideal-gas equation allows us to calculate gas density from the molar mas pressure, and temperature of the gas. Recall that density has the units of me per unit volume (d = m/V). a (Section 1.4) We can arrange the gas equat to obtain similar units, moles per unit volume, n/V: P V RT If we multiply both sides of this equation//// @ sergM,

The eternal struggle in engineering offices everywhere! When drafters (who use AutoCAD daily) ask mechanical engineers for help with basic functions, they're met with the digital equivalent of trying to explain quantum physics to a toddler. Engineers can design complex systems that defy gravity but somehow turn into confused keyboard-smashers when asked to fix a simple layer issue. It's the perfect role reversal - the technical wizards suddenly becoming the technological cavemen! The crying meme perfectly captures that moment of despair when you realize your highly educated colleague is hopelessly clicking random buttons while muttering "it worked last time..."

The precision hierarchy is real! NASA astronomers need 40 decimal places of π to calculate the entire universe's circumference down to an atom's width. Computer scientists flex with their "50 TRILLION decimal places" because they can. Meanwhile, engineers are just standing there like "Three. Take it or leave it." 🤣 This is the classic π ≈ 3 engineering approximation in action! While mathematicians and scientists obsess over precision, engineers know that sometimes "close enough" gets the job done. Why waste time with infinite decimals when your safety factor is already 200%?

The eternal dilemma of time travel ethics! Take the red pill and go back to whisper differential equations to Einstein's nurse, or take the blue pill and casually engineer a Dyson sphere that harvests the entire energy output of a star. Just your average Tuesday morning choices for theoretical physicists with god complexes. The real joke? Both options assume we'd actually leave our desks long enough to do either. For the uninitiated, a Dyson sphere is a hypothetical megastructure that completely encompasses a star to capture its energy output. Totally doable with your weekend DIY kit and some duct tape, right? Meanwhile, altering Einstein's timeline might erase half of modern physics—but hey, at least you'd get to meet the man with the legendary hair!