A black paper absorbs light of all the colours and reflects none-

Question

Toppr Admin · Accepted Answer

Correct option is A- TrueFrom conversion from -ms-1- to-160-kmh-1- we get-As -1km-1000m- and -1hr-3600sec-5-160-ms-1-160-dfrac-5m-sec- -dfrac-5 -times 10-3-km-1-3600hr-0-005 -times 3600- -18kmh-1-Hence-the speed 5-160- ms-1- - is less than 25 km-160- h-1- -

A black paper absorbs light of all the colours and reflects none.

Correct option is A. True
From conversion from $$ms^{-1}$$ to $$kmh^{-1}$$ we get,
As $$1km=1000m$$ and $$1hr=3600sec$$

5 $$ms^{-1}$$ =$$\dfrac{5m}{sec}$$= $$\dfrac{5 \times 10^{-3}km}{1/3600hr}$$=$$0.005 \times 3600$$ =$$18kmh^{-1}$$
Hence,the speed 5 $$ ms^{-1} $$ is less than 25 km $$ h^{-1} $$.

A black paper absorbs light of all the colours and reflects none.

Correct option is A. TrueFrom conversion from $$ms^{-1}$$ to $$kmh^{-1}$$ we get,As $$1km=1000m$$ and $$1hr=3600sec$$5 $$ms^{-1}$$ =$$\dfrac{5m}{sec}$$= $$\dfrac{5 \times 10^{-3}km}{1/3600hr}$$=$$0.005 \times 3600$$ =$$18kmh^{-1}$$Hence,the speed 5 $$ ms^{-1} $$ is less than 25 km $$ h^{-1} $$.