Suicidal mug

I bet the mug attached to a string will not shatter if I let it drop over a wooden spoon. (There is a key tied to the other end of the string.)

فيزيك

Grades 7 – 12

نویسنده: Stonawski Tamás

بازبین: Dr. Sós Katalin

موزالينک

لينک وب