An incandescent bulb produces light that comes from the heating of a filament. A compact fluorescent bulb produces light when a substance is hit by electromagnetic radiation. Compact fluorescent bulbs are more efficient than incandescent bulbs.
The first law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamic processes. Therefore, a system with lower heat emissions would be more efficient.
The second law of thermodynamics states that the total entropy of an isolated system (the thermal energy per unit temperature that is unavailable for doing useful work) can never decrease. In our context, it means that the system with the least amount of losses would be more efficient. As a conclusion the fluorescent bulb would be more efficient.
The other force that must be acting on the duck is upthrust of 10 N.
The given parameters;
- <em>weight of the rubber duck, W = 10 N</em>
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When the weight of the object is equal to the upthrust, the apparent weight will be zero and the object will float in the liquid. This is known as principle of floatation.
Since the given weight of the rubber duck is 10 N, then the <em>upthrust</em> on the duck will be 10 N to enable the duck float on the water.
Thus, the other force acting on the duck is upthrust of 10 N.
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The smaller the mass of an object, the greater the acceleration of that object when a force is applied because mass and acceleration are inversely related
The greater the force applied, the greater the acceleration as Force and acceleration are directly related quantities.
Answer:
7.55 g
Explanation:
Heat of fusion = 333kj/kg
Heat capacity, c = 4190 j/kg /k
Heat capacity in j/g /k = 0.4190
Let the Number of grams of ice that will melt = n
Number of grams * heat of fusion = heat capacity * temperature change
n * 0.333 = 0.419 * (6-0)
0.333n = 2.514
n = 2.514 / 0.333
n = 7.5495
n = 7.55 gram
Hence, the number of gram of ice that will melt is 7.55 grams
