An example of convection and conduction within a BBQ. I also accept diagrams but please write honestly or I will report.

1 answer:

7 0

Conduction could be the way in which heat is transferred through a sausage to get it up to cooked temperature. convection could be the air around the barbecue and the smell of the barbecue being carried on thermal convection currents. hope this is honest enough

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A 5.00-kg box slides 5.50 m across the floor before coming to rest. What is the coefficient of kinetic friction between the floo

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Answer:

μk = 0.08

Explanation:

Applying the work-energy theorem, we know that the change in kinetic energy of the box, is equal to the total work done on it.
The only force acting on the box capable of doing work, is the dynamic friction force.
This force is just the product of the coefficient of kinetic friction, and the normal force.
In this case, if the floor is level, the normal force is equal and opposite to the gravity force, Fg.
So we can write the following expression:

$\Delta K = -\frac{1}{2} * m* v_{0} ^{2} = \mu_{k} *m*g* cos (180\º)$

Replacing by the givens, we can solve for μk, as follows:

$\mu_{k} = \frac{v_{0}^{2} }{2*g*d} = \frac{9 (m/s)2}{2*9.8 m/s2*5.50m} = 0.08$

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Explanation:

We know that,

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Upthrust on the bucket makes the bucket filled with water lose some of it's weight and causes apparent loss in weight.

Hence, the bucket filled with water seems light while it sinks into water.

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