Question
An echo is returned in 6s. What is the distance of reflecting surface from source? [given that speed of sound is 342m/s]
An echo is returned in 6s. What is the distance of reflecting surface from source? [given that speed of sound is 342m/s]
Speed of sound, u = 342m/s
Time taken for hearing the echo, t = 6s
Distance travelled by the sound, u × t = 342 × 6 = 2052
$\text{speed}=\frac{\text{distance}}{\text{time}}$
so, distance of the reflecting surface from the source $=\frac{2052}{2}$
$=1026\text{m}$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Classily the following seeds into dicot and monocot: wheat, maize, bean, gram.
What is the density of a substance of mass 100g and volume 10cm3?
Define the term 'work'. Write the formula for the work done on a body when a force acts on the body in the direction of its displacement. Give the meaning of each symbol which occurs in the formula.
Distinguish between the following pairs in one or two sentences for each:
Bone and cartilage.
What is hierarchy of categories?