Answer:
im not 100 percent but its probably 2 turtles 20m apart
Answer:
I know only answer second.
Explanation:
An objective sports and heigh
a lens produces its image 12 cm high.
so the formula of magnification is image height upon object height.So,
12/4=3 Answer
hope it helps
Answer:
Explanation:
As per Doppler's effect of sound the frequency of the sound when source is approaching the observer is given as
similarly when source is moving away from the observer then its frequency is given as
now we know that the ratio of two frequency is
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