November 10, 2026
Quick answer: A 100-gallon propane tank holds about 420 pounds of propane when filled to the standard 80% capacity (80 gallons × 4.24 lb/gallon). The tank itself weighs roughly 150–180 lb empty. Propane tanks are never filled to 100% — the 80% rule leaves room for the liquid to expand in warm weather. Here’s how
READ MORE
Quick answer: Begin formal emails with “Dear Mr/Ms [Surname]” or “Dear [First Name]” for semi-formal. For very formal or unknown recipients, use “Dear Sir or Madam” or “To Whom It May Concern.” Casual emails can start with “Hi [Name]” or “Hello [Name].” The first line of an email sets the entire tone. Get it right
READ MORE
Quick answer: Trick question — a light-year measures distance, not time. It’s how far light travels in one year: about 9.46 trillion kilometres (5.88 trillion miles). It equals zero years. “How many years is a light-year?” is one of the most common astronomy questions — and the confusion is completely understandable. The name sounds like
READ MORE
Quick answer: An acre is 4,840 square yards (4,047 square metres) — about 75% of a football pitch. It has no fixed length; it’s a measure of area, not distance. A square acre would measure about 63.6 metres per side. “How long is an acre?” is a trick question — acres measure area, not length.
READ MORE
Quick answer: To make brown paint, mix red, yellow, and blue (the three primaries) together — or simply mix orange and blue, which are complementary colours. Adjust with more yellow for warm browns or more blue for cool browns. Brown is the most forgiving colour to mix — it’s hard to get it badly wrong.
READ MORE
Quick answer: To make slime less sticky, knead in saline solution or contact lens solution (with boric acid) a teaspoon at a time, or add a small amount of baking soda mixed with water. Keep kneading — stickiness usually resolves with thorough mixing. Sticky slime is the most common slime-making frustration. The good news: it’s
READ MORE
Quick answer: A standard can of soda contains 12 fluid ounces (355 ml) in the US. In the UK, standard cans are 330 ml (11.2 fl oz). Larger “tall boy” cans hold 16 oz. The humble soda can is so familiar we rarely think about its size — until a recipe, a diet plan, or
READ MORE
Quick answer: Approximately 620,000 to 750,000 soldiers died in the American Civil War (1861–1865). The traditional figure of 620,000 has been revised upward by modern research to around 750,000 — making it by far the deadliest war in American history. The American Civil War killed more Americans than all other US wars combined. For 150
READ MORE
Quick answer: A standard 8×8×16 inch concrete block (CMU) weighs 28–35 pounds (12.7–15.9 kg). Lightweight blocks weigh 22–28 lb, while solid or filled blocks can exceed 40 lb. Whether you’re building a garden wall, planning a delivery, or calculating foundation loads, concrete block weight affects everything from labour to transport costs. Here’s what the different
READ MORE
Quick answer: 5 US gallons of water weighs 41.7 pounds (18.9 kg). This is why full 5-gallon water cooler bottles are famously heavy to lift. Anyone who’s wrestled a water cooler bottle onto a dispenser knows: water is heavy. Five gallons is one of the most common bulk quantities — for coolers, camping, aquariums, and
READ MORE