Select the incorrect statement :

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In SI unit 360 miles per hour is equal to 160 ms-l

In SI unit 100 million miles is equal to 1.6 x 1011 m.

In SI unit 0.54Ao is equal to 5.4 x 10-11 m.

In SI unit 10 pounds is equal to 3.54 kg

answer is D.

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Detailed Solution

Statement (1 ,2,3) are correct and (a) is incorrect Correct (4):1 pound = 454 x l0-3 kg. Unit factor =454×10-3(kg)1 pound∴10 pound=10pound×454×10-3kg1 pound=454 x 10-2(kg)=4.54kgExplanation for (1,2,3)(1) 1 mile = 1.60km=1.60x103mUnit factor 1.60×103m1 mile1hr=60 x 60s =3.6 x 103 s∴Speed=360 mileshr=360 mileshr×1.60×103m1 mile×1 hr3.6 ×103s=160 ms-1(2) 100 million miles = 100×106(miles)×1.6×103m1 mile=1.6×1011m(3) 1 Ao = 10-10mUnit factor = 10-10m1(Ao)∴0.54 Ao= 0.54 Ao×10-10m1(Ao)=5.4 ×10-11m

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