Question 1.13: Convert each of the following to three significant figures: ...
Convert each of the following to three significant figures: (a)20 lb.ft to N.m , (b)450 lb/ft³ to KN/m³, and (c) 15 ft /h to mm /s.
Using Table 1–2, we have
\begin{aligned}a) 20 lb \cdot ft &=(20 lb \cdot ft )\left(\frac{4.448 N }{1 lb }\right)\left(\frac{0.3048 m }{1 ft }\right) \\&=27.1 N \cdot m\end{aligned}\begin{aligned}b)450 lb / ft ^3 &=\left(\frac{450 lb }{1 ft ^3}\right)\left(\frac{4.448 N }{1 lb }\right)\left(\frac{1 kN }{1000 N }\right)\left(\frac{1 ft ^3}{0.3048^3 m ^3}\right) \\&=70.7 kN / m ^3\end{aligned}
c) 15 ft / h =\left(\frac{15 ft }{1 h }\right)\left(\frac{304.8 mm }{1 ft }\right)\left(\frac{1 h }{3600 s }\right)=1.27 mm / s
Related Answered Questions
Question: 1.7
Verified Answer:
Using Table 1–2, we have
1\;\mathrm{Pa}={\f...
Question: 1.15
Verified Answer:
Applying Eq. 1–3, we have
a) m = \frac{W}{...
Question: 1.5
Verified Answer:
\text { a) } 0.000431 \mathrm{~kg}=0.00043...
Question: 1.4
Verified Answer:
\text { a) } \mathrm{m} / \mathrm{ms}=\left...
Question: 1.2
Verified Answer:
\left(4.70 \mathrm{slug} / \mathrm{ft}^3\...
Question: 1.1
Verified Answer:
a) 58.3 km b) 68.5 s c) 2.55 kN d) 7.56 Mg
Question: 1.10
Verified Answer:
\begin{aligned} a)(0.631 Mm ) /(8.60 kg )^...
Question: 1.11
Verified Answer:
\begin{aligned}a) (354 mg )(45 km ) /(0.035...
Question: 1.14
Verified Answer:
\text { a) }(430 kg )^2=0.185\left(10^6\rig...
Question: 1.9
Verified Answer:
Using Table 1–2 and applying Eq. 1–3, we have [...