Explanation:
The difference between final and initial position of an object is called its displacement. Its formula is given by :
It is equal to the shortest path covered by it. It is a vector quantity. It has both magnitude and direction.
Which of the following in NOT an ionic compound? NaBr MgCl2 O SCI2 K (NO3)
1 answer:
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Answer:
s = 1800 m = 1.8 km
Explanation:
The distance, the speed, and the time of reach of the sound are related by the following formula:
where,
s = distance
v = speed
t = time
FOR WATER:
---------------------- eq (1)
where,
s = distance between ship and diver = ?
= speed of sound in water = 1440 m/s
t = time taken by sound in water
FOR AIR:
---------------------- eq (2)
where,
s = distance between ship and diver = ?
= speed of sound in water = 344 m/s
t + 4 s = time taken by sound in water
Comparing eq (1) and eq (2),because distance remains constant:
t = 1.25 s
Now using this value in eq (1):
<u>s = 1800 m = 1.8 km</u>