A Admin 🎓 Coach ⭐ 38.23K Points 📊 Physics Q. What James Watt invented? (A) Diving bell (B) Steam boat (C) Hot air balloon (D) Rotary steam engine 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (D) Rotary steam engine You must be Logged in to update hint/solution 💬 Discussion 💬 Comment