1. Which of the following statement in regard to unit conversions is correct?
(A) One kilogram is equal to 10-9 teragrams.
(B)Twenty-five femtograms are equal to 2.5 × 10-14 kilograms.
(C) Eight liters are equal to 80 cubic decimeters.
(D) 294.5 nm are equal to 2.945 × 107 centimeters.
(E)One microliter is equal to 10-6 milliliters.
答案:登入後查看
統計: A(5), B(3), C(0), D(1), E(2) #2344093
統計: A(5), B(3), C(0), D(1), E(2) #2344093
詳解 (共 3 筆)
#5582660
(A)正確,tera- 為1012
(B)femtogram是 10-15 gram ,或 10-18 kilogram
(C)1 liter(公升)=1 cubic decimeter(立方公寸)
(D)1nm=10-7cm
(E)1 microliter=10-3 milliliter=10-6 liter
1
0