Hello friend, excellent explanation of the way helicopters and planes are kept in the air, all this is pure physics, all your collages have important information. I congratulate you, excellent collage.
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Hello my friend, @cetb2008. Your kids might like this collage. It is fantastical. Thanks for the comment on my little physics lesson. I never heard of Bernoulli's Principle before. I found it fascinating. These collages are excuses for me to sort of go back to school. Every week I learn something new.
Thank you for visiting and for your kind words. Please enjoy the week with your beautiful family.