कक्षा ग्यारहवीं का रिवीजन टेस्ट का पेपर बताएं भौतिक
Answers
Answered by
8
cant understand the question
Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactionsvein. Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the body. Veins are blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation.
Similar questions