Explainer Zone™ on Instagram: "This video is a perfect reminder of how the term “horsepower”—a unit we use casually when talking about cars—originated from the real, raw strength of actual horses. One horsepower was defined by engineer James Watt in the 18th century as the power needed for a horse to pull around 180 kg with steady force, equivalent to 746 watts of energy. But the horses shown here are not ordinary riding horses—they’re draft horses, specially bred for strength, capable of pullin

Jeff Nippard on Instagram: "What does 20% body fat actually look like? I measured the body fat of over 50 people using DEXA and BIA, and found that even at the exact same body fat, two people can look quite different! Where you store your bodyfat can also vary a lot from person to person. Some store more in their legs, others more in their arms or midsection. The bottom line is to focus less on a specific number and instead find a healthy body composition where you move well and feel good! That

Practical Machinist on Instagram: "Time to ditch the analog refractometer! @rebecca.wolfinger shows how to calibrate your digital refractometer, measure the Brix and calculate your coolant concentration using the refractive index. Quick, accurate and no more guessing."