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Solve: log_10 a = 1.345

Given,log10 a = 1.345This can be written as:a = (10)1.345= 22.1309471Therefore, the value of a is 22.1309471.

A car is fitted with a convex side-view mirror of focal length 20 cm. A second car 2.8 m behind the first car is overtaking the first car at a relative speed of 15 m/s. The speed of the image of the second car as seen in the mirror of the first one is:

Solution: According to the mirror formula: \(\begin{array}{l}\frac{1}{v}=(\frac{1}{-280})= \frac{1}{20}\end{array} \) \(\begin{array}{l}\frac{1}{v}= \frac{1}{20}+ (\frac{1}{280})\end{array} \) \(\begin{array}{l}v= (\frac{280}{15})\end{array} \) \(\begin{array}{l}v_{1}= -(\frac{v}{u})^{2}v_{om}\end{array} \) \(\begin{array}{l}v_{1}=... View Article