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NARA [144]
3 years ago
5

explain how a convection current is set up in water. The explanation has been started for you: When the heating element is switc

hed on, the hot water nearest the element rises because...
Physics
2 answers:
Montano1993 [528]3 years ago
3 0
It is less dense than the water above it and so it the heated less dense water rises upwards to replace the denser water and the denser water falls below to the heating element below, and this also becomes less dense and the circle continues, thus setting up the convection current.

Similar principle is applied in convection current for land and sea breezes.
Kamila [148]3 years ago
3 0
It is less dense than the surrounding water
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Answer:

(A) Reading will be 65 N

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Explanation:

We have given the balance force = 65 N

Acceleration due to gravity g=9.8m/sec^2

We know that W=mg

So 65=m\times 9.8

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(a) In first case as the as the speed is constant so the force on the elevator will be 65 N

(B) In second case as the elevator is decelerating at a rate of 2.4m/sec^2

So net acceleration = 9.8-2.4=7.4m/sec^2

So net force on elevator will be = m× net acceleration = 6.632×7.4 = 49.076 N

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