Look up what HEAT does. Then apply your physics degree to it. If you still don't have an answer, then I would recommend returning your degree for a refund.
Nothing happened to the tank in the first video. Didn't check the other videos, so I don't really care.
While these tanks could have benefited from specific defensive upgrades in some cases, the real lesson to be drawn was less about technical deficiencies and more about crew training, competent morale, and sound tactical employment matter more even than “invulnerable” armor. The interconnected...
nationalinterest.org
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warisboring.com
Otoh:
German Leopard-2 Tanks are often considered one of the most powerful main battle tanks in the world. But how did Leopard-2 Tanks operated by Turkey fare against ISIS in Syria?
eurasiantimes.com