Facts & Conversions

How Long does It Take to Learn a Language? Complete Answer

Quick answer: Research from the US Foreign Service Institute puts language learning at 600–750 class hours (about 6 months full-time) for the easiest languages like French and Spanish, and 2,200 hours (about 2 years full-time) for the hardest, such as Mandarin, Arabic, Japanese, and Korean. For a part-time learner doing 30–60 minutes a day, expect

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Facts & Conversions

How Fast do Helicopters Fly: What You Need to Know

Most helicopters cruise at 130–160 mph (210–260 km/h), with a top speed of around 180–200 mph (290–320 km/h). The fastest production helicopter, the Westland Lynx, set a world record of 249 mph (401 km/h) in 1986. Helicopters are much slower than aeroplanes because of fundamental limits in how rotor blades generate lift. Typical Helicopter Speeds

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