Answer
(a) $10,800~s$
(b) $172,800~s$
(c) $3.1536\times 10^7~s$
(d) $65.5~m/s$
Work Step by Step
(a) $(3~hr)(\frac{3600~s}{1~hr}) = 10,800~s$
(b) $(2~days)(\frac{24~hr}{1~day})(\frac{3600~s}{1~hr}) = 172,800~s$
(c) $(1~yr)(\frac{365~days}{1~yr})(\frac{24~hr}{1~day})(\frac{3600~s}{1~hr}) = 3.1536\times 10^7~s$
(d) $(215~ft/s)(\frac{1~yd}{3~ft})(\frac{0.9144~m}{1~yd}) = 65.5~m/s$
