If light moves at a speed of about 3.00 x 108 m/s, how long will it take light to travel the distance of a marathon (about 42.2 km)? express your answer in microseconds using the correct number of significant figures. do not enter your answer using scientific notation.

The time taken in microseconds equals 140.7 microseconds

Explanation:

From the basic relation of speed, distance and time we can write

In our case distance equals 42.2 kilometers which equals

Using the given values in the above relation we get

Converting into microseconds we get

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

b. examine and describe cells