Cards starting with P

1,597 cards. Page 20 of 27.

  1. Potential theory: The hidden mathematical language of gravity, electricity, and random movementPotential theory is the study of harmonic functions, the mathematical backbone of 19th-century physics. Originally developed to model gravity and electrostatic forces, this field …
  2. Poti is a Georgian port city built on the site of an ancient mythLocated at the mouth of the Rioni River, Poti sits on the ruins of Phasis, a Greek colony famously linked to the legend of Jason and the Argonauts. This strategic Black Sea locati…
  3. Potsdam: A Royal Retreat That Shaped the Modern World Through Architecture and DiplomacyBeyond its reputation as a picturesque landscape of palaces and lakes, Potsdam has served as a crucible for European history. From the Enlightenment ideals of Prussian kings to th…
  4. Pottage was the eternal, ever-changing stew that defined the diet of medieval Europe.For centuries, pottage was the ultimate staple, a simmering pot of grains, vegetables, and whatever meat or fish was available. It was a dish that never truly finished, constantly…
  5. Poul Schlüter: The Conservative who reshaped Danish politics for over a decadeAs Denmark's first Conservative prime minister since 1901, Poul Schlüter navigated a complex political landscape for eleven years. From his origins in a border region to his event…
  6. Poulenc adored what he called bad music, then wrote profound sacred worksFrancis Poulenc's mother, a capable pianist, played everything from classics to lowbrow pieces, leaving her son forever fond of what he called adorable bad music. He became known …
  7. Pound for pound, a pony can pull and carry more than a horsePonies are small horses, but not weak ones. Bred in harsh, cold places where people needed sturdy workers, draft-type ponies can haul far more than their own weight, and even tiny…
  8. Pound for pound, these tiny animals are the world's most impressive long-distance travelers.Size does not dictate endurance in the animal kingdom. This video profiles five small creatures that undertake massive migratory journeys, proving that even the smallest fliers ca…
  9. Pound shaped modernism—and broadcast for Fascist ItalyAmerican poet Ezra Pound (1885–1972) drove Imagism's spare precision and midwifed other modernists from London editorial desks. He later moved to Italy, pushed social-credit econo…
  10. Pounds, shillings and pence were Charlemagne's idea and lasted over a thousand yearsBritain's old money, with 12 pence to the shilling and 20 shillings to the pound, was not a quirky island invention. It came from the Frankish emperor Charlemagne around the 780s,…
  11. Poussin fled the French court to keep painting in RomeNicolas Poussin, June 1594 to 19 November 1665, led classical French Baroque painting yet spent most of his career in Rome for Italian and French collectors. A brief turn as First…
  12. Poutine's name may come from a cook's outburst about a damn messA regular at a café in rural Quebec reportedly asked the owner to toss cheese curds into his bag of fries. The owner is said to have warned it would make a damn mess, a maudite po…
  13. Poverty can reduce cognitive capacity by consuming mental resourcesResearchers who studied the relationship between wealth and mental performance found that poverty can directly impede cognitive function. In one experiment, inducing thoughts abou…
  14. Power electronics play a vital role in integrating renewable energy into power gridsA review of renewable energy integration found that power-electronic interfaces are essential for connecting wind and photovoltaic power generators to the grid. These systems must…
  15. Power inverters transform direct current into alternating current to run your household electronics.A power inverter does not create energy; it acts as a bridge, converting direct current from batteries or solar panels into the alternating current required by most appliances. Wh…
  16. Power lines run at huge voltages so less energy is lost as heatPush electricity down a long wire and some of it warms the metal instead of reaching anyone. Raising the voltage lowers the current and cuts that waste, which is why transmission …
  17. Power pop is the Rodney Dangerfield of rock, yet its influence remains undeniable.Coined by Pete Townshend in 1967, power pop blends the melodic sweetness of the Beatles with the crunching energy of the Who. Despite producing massive hits like My Sharona, the g…
  18. Power series treat functions as polynomials that never endAdd 1, then x, then x squared, then x cubed, forever, and for small enough x you get exactly 1 divided by 1 minus x. Power series like this let mathematicians rebuild sine, the ex…
  19. Power structures and entrenched interests hinder the transition to a low-carbon worldDespite thirty years of international cooperation and scientific warnings, global carbon dioxide levels have climbed by 60% since 1990. A review of existing research suggests that…
  20. Power, gender, and the motives behind Shakespeare's most famous regicideExplore the hidden agency of Ophelia and Gertrude in this deep dive into Shakespeare's Hamlet. This video examines the complexities of gender roles, the significance of Ophelia's …
  21. Powered paragliding offers the freedom of flight with just a backpack and a wing.Powered paragliding, or paramotoring, allows pilots to launch from level ground using only a motor strapped to their back. This ultralight aviation sport offers an open-air experi…
  22. Powerful galactic nuclei regulate star formation by heating surrounding gasAstronomers observing active galactic nuclei (AGN) have found evidence that energy from these massive centers can reshape entire galaxies. By releasing radiation, winds, and jets,…
  23. Powerlifting crowns squat, bench, and deadlift maxesPowerlifting asks athletes for three maximal single attempts each on squat, bench press, and deadlift—odd-lift roots refined into a strength sport. Lifters compete raw or equipped…
  24. PPE is the last rung on the workplace safety ladderHelmets, gloves, respirators, and goggles sit at the bottom of the hazard-control hierarchy—used when elimination, substitution, engineering, and administrative fixes cannot cut r…
  25. Practical daily habits to consider for cancer prevention and careThis video outlines general lifestyle adjustments and tips relevant to both preventing cancer and managing life after a diagnosis. It serves as a starting point for those seeking …
  26. Practical exercises and tips to help manage and relieve common back painA significant portion of the global population experiences back pain. This video provides actionable advice and specific exercises designed to help alleviate discomfort and promot…
  27. Practical home improvement solutions for garage graffiti, nursery storage, and hidden radon risks.This episode of Ask This Old House addresses common household challenges, from removing unsightly graffiti to optimizing nursery storage and detecting invisible safety hazards. Th…
  28. Practical home maintenance solutions for water management and essential tool knowledgeThis episode of Ask This Old House addresses common household challenges, from managing rainwater runoff to understanding the versatility of pliers. It is a useful guide for homeo…
  29. Practical home repairs and landscaping solutions from the experts at Ask This Old HouseThis episode of Ask This Old House tackles common property challenges, from installing shade sails for outdoor comfort to performing budget-friendly concrete repairs. It also high…
  30. Practical home solutions for accessibility and essential roof maintenanceThis episode of Ask This Old House demonstrates how to construct a wheelchair-accessible garden bed and provides a step-by-step guide for fixing a common roof leak caused by a fai…
  31. Practical home solutions for garden soil health and bathroom moisture controlThis episode of Ask This Old House addresses common residential maintenance challenges. Experts guide a homeowner through improving garden soil for new plantings and demonstrate t…
  32. Practical home upgrades and community projects from the experts at Ask This Old House.The fourteenth season premiere of this home improvement series demonstrates how to boost energy efficiency and foster community engagement. Experts tackle a residential cooling pr…
  33. Practical home upgrades: from motion-activated security lights to replacing bathroom sink fixturesThis episode of Ask This Old House demonstrates how to enhance home security and update bathroom plumbing. Experts provide step-by-step guidance on installing motion-sensing drive…
  34. Practical methods for achieving stronger and healthier hair for everyoneThis video provides straightforward tips designed to help both men and women improve the health and strength of their hair. It serves as a concise guide for those seeking actionab…
  35. Practical shooting balances precision, power, and speed in dynamic, unpredictable, and inventive scenarios.Unlike traditional target sports, practical shooting demands that competitors navigate unfamiliar courses, fire from awkward positions, and solve unique challenges under pressure.…
  36. Practical solutions for home maintenance from the experts at Ask This Old HouseThis episode of Ask This Old House addresses common homeowner challenges, ranging from selecting the right groundcover for your landscape to improving home heating efficiency and …
  37. Practical solutions for managing rainwater and drainage around your home garden and patioThis episode of Ask This Old House demonstrates how to install a rain barrel for stormwater management and techniques for redirecting pooling water on a stone patio. The experts a…
  38. Practical strategies for navigating the rigorous CFA charter examination processThe Chartered Financial Analyst designation is widely considered a benchmark for excellence in the investment industry. A recent charterholder shares his personal approach to prep…
  39. Practical strategies to help you tackle your seasonal home cleaning routine effectively.Spring cleaning is a common goal for many households as the season changes. This video outlines eight specific tips to help you organize and complete your cleaning tasks efficient…
  40. Practical strategies to manage and overcome the stress of taking important academic exams.Test-taking anxiety can hinder academic performance. This guide provides expert-backed techniques to help students transform their attitude toward learning and manage the pressure…
  41. Practical strategies to navigate the emotional aftermath of a breakup and move forwardBreakups are difficult, but they do not have to be navigated in isolation. This video provides actionable advice on managing emotions, establishing boundaries, and rebuilding your…
  42. Practical techniques for maintaining and styling men's hair and facial hair dailyThis video provides instructional guidance on managing men's hair and facial hair. It offers actionable tips for daily grooming and styling, including specific advice on how to ma…
  43. Prader–Willi syndrome shows why it matters which parent a gene came fromFor a handful of genes on chromosome 15, only the copy inherited from the father does any work; the mother's is silenced. Lose the father's version and Prader–Willi syndrome follo…
  44. Pragmatism says an idea means nothing more than what it doesAmerica's homegrown philosophy started in a Cambridge discussion group in the 1870s with a bold test: to understand any concept, list the practical effects it would have, and that…
  45. Prague Castle is the world's largest ancient fortress, spanning a millennium of architectural evolution.Spanning nearly 70,000 square metres, Prague Castle is more than a royal seat; it is a sprawling architectural timeline. From Romanesque foundations to Gothic cathedrals and Renai…
  46. Prague threw officials out of windows three times, and once it started a thirty-year warIn May 1618, angry Protestant nobles hurled two Catholic regents and their secretary out of a window at Prague Castle. All three survived a drop of about 21 metres. Catholics cred…
  47. Prague’s Maharal wrote mystical Torah—and inherited a golem legendJudah Loew ben Bezalel (c. 1524–1609), the Maharal of Prague, authored Jewish philosophical and mystical works including Gur Aryeh al HaTorah on Rashi. Centuries later, folklore c…
  48. Prajnaparamita is the perfection of wisdom, a massive body of ancient Buddhist scripture.Meaning literally the perfection of wisdom, Prajnaparamita is a central Mahayana Buddhist concept representing a perfected way of seeing reality. It encompasses a vast, evolving c…
  49. Pranab Mukherjee: The Architect of Indian Governance and a Master of Political SurvivalKnown as a number-crunching strategist with an unerring instinct for survival, Pranab Mukherjee served at the highest levels of Indian government for five decades. From his early …
  50. Pratibha Patil: How India's first female president navigated a term defined by controversyPratibha Patil made history in 2007 as India's first female president, yet her tenure remains a subject of intense debate. From accusations of shielding family members to unpreced…
  51. Prato is Italy's textile powerhouse, balancing medieval relics with a modern Chinese industrial hub.Tuscany's second-largest city, Prato, is a study in contrasts. While its historic center preserves Renaissance art and the sacred Holy Girdle, the city has evolved into Europe's l…
  52. Praxidice: The ancient Greek goddess who turned justice into a cold, hard practice.In the complex pantheon of Greek justice, Praxidice stands apart as the goddess of enforcement. While others represented the abstract ideals of law, she was the one who ensured ju…
  53. Praying posture hides a stereo hunter with ultrasound earsA mantis freezes with spiked forelegs folded, looking devout—hence praying mantis. The pose is an ambush cockpit. Compound eyes with up to ten thousand facets track prey in stereo…
  54. Prazosin: A blood pressure medication that unexpectedly helps with nightmares and sleep disordersOriginally developed to manage high blood pressure by relaxing blood vessels, prazosin has found a surprising second life. Clinicians now use this alpha-blocker to treat diverse c…
  55. Pre-Columbian art was a sophisticated language of divinity, cosmology, and complex social record-keeping.Long before European arrival, indigenous civilizations across the Americas created monumental sculptures, intricate goldwork, and textiles that served as active extensions of the …
  56. Pre-eclampsia was once blamed on toxins; the placenta is the real suspectDoctors used to call pre-eclampsia toxaemia of pregnancy, believing poisons caused it. That idea was wrong. The strongest evidence now points to a placenta that implants abnormall…
  57. Preadolescence is a distinct developmental bridge between childhood and the onset of puberty.Often called the tween years, preadolescence is a period of profound neurological and social transformation. While once dismissed as a dormant stage, research reveals it as a time…
  58. Precipitation is the art of turning liquid solutions into solid, measurable chemical treasures.When a solution becomes supersaturated, it sheds its excess cargo as a solid precipitate. This fundamental chemical process is not just for lab beakers; it is how we purify protei…
  59. Precision and peril: how astronauts prepare for the void of spaceStepping outside the International Space Station is a high-stakes dance where every second is choreographed. Beyond the thrill of exploration lies a rigorous process of risk manag…
  60. Precision and poise: The shooting events at the 2022 Asian Games in HangzhouThe 2022 Asian Games brought together 470 athletes from 36 nations to compete in shooting events. Held at the Fuyang Yinhu Sports Centre in China, the competition spanned eight da…