In 1242 A.D., Roger Bacon discovered that black powder (gunpowder) would explode rather than simply burn if he did what?

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معزز ممبران، خدمات کے معیار کو بہتر کرنے کے لئے ہم نے ایف جی اسٹڈی کوئز کے ڈیزائن اور ڈھانچے کو تبدیل کیا ہے۔جس سے کچھ پرانے صفحات کا ایڈریس تبدیل ہوچکا ہے۔اگر آپ کو مطلوبہ مواد/صفحہ نہیں مل رہا تو براہ کرم اس لنک پر جائیں
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In 1242 A.D., Roger Bacon discovered that black powder (gunpowder) would explode rather than simply burn if he did what?

Heated it slowly

Sang Over the rainbow

Place it in a vacuum

Confined it in a small space