F= (speed)/(wavelength)
Therefore, speed = Frequency x wavelength
V = 68m/s
Answer:
i would describe an ocean current like a pull of the water
Explanation:
water
Answer:
the correct answer is D.) 2,4
Answer:
The relative density of the second liquid is 7.
Explanation:
From archimede's principle we know that the force that a liquid exerts on a object equals to the weight of the liquid that the object displaces.
Let us assume that the volume of the object is 'V'
Thus for the liquid in which the block is completely submerged
The buoyant force should be equal to weight of liquid
Mathematically

Thus for the liquid in which the block is 1/7 submerged
The buoyant force should be equal to weight of liquid
Mathematically

Comparing equation 'i' and 'ii' we see that

Since the first liquid is water thus 
Thus the relative density of the second liquid is 7.
Let the mass of planet and moon be Mp and Mn respectively.
And the distance between them is "r"
Then according to Newton's law of gravitation,
The force with which the planet and the moon attract esch other is
1) directly proportional to the product of their masses i.e. Mp * Mn
2) inversly proportional to the square of the distance between them i.e r ^2
Therefore,F =. G (Mp* Mn)/r^2
Where,G is gravitational constant