Câu trả lời:
Đáp án D
Đáp án D
Giá trị của biến x là 28
=(2x2)2 + 2.2x2.3+32
=4x4+12x2+9
Áp suất lên đáy bình là:
1.5 x 10000= 15000 Pa
Tóm tắt:
m=60 kg
s=0.03 m2
p=?
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