matt built a boat with a mass of 320g. When he tried it out, he found that it displaced 260g of water. did the boat sink or floa
1 answer:
When we put an object inside the water then the submerged part of the object will displace water.
this weight of displaced water is known as buoyancy force on the object
Now as we know the principle of flotation if buoyancy force due to fluid on the object is more than weight then object will easily float
So here we can say that
now here we know that buoyancy force is the weight of liquid which is displaced and that weight must be more than weight of object for flotation
So here we can say
So here we know that mass of object is 320 g
mass of liquid displaced 260 g
here
mass of liquid displaced < mass of object
So it will not float and it will sink
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The distance from a 27 mw point source of electromagnetic waves where the electric field amplitude 0. 060 v/m will be 21.21 m .
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c = 3 * m/s
∈ = 8.85 *
/ N/
E = 0. 060 v/m
I = P / 4π
Also , I = c ∈ /2
= P / 4π I equation 1
substituting the value of I in equation 1
= 2 P / 4π (c ∈
)
= 2 * 27 *
/ 4 * 3.14 * 3 *
* 8.85 *
*
r = 21.21 m
To learn more about Electromagnetic waves here
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