What energy is needed to raise the temperature of 2 kg of water from 20 ºC to 100 ºC. The heat capacity of water is 4190 J /kg/
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The scientific method consists of making an observation, ask a question, formulate hypothesis, predict, test, iterate
The scientific question that can be asked is; <u>What is the </u><u>depth of the well</u>
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The reason why the above question is appropriate is as follows:
The items Jack and Jill found at the well
- No pail
- A stopwatch
- Nine equal sized rocks
The information they can get using what they found are;
The time it takes the rock to reach the water surface in the well
The depth of the well
The well's depth, <em>h</em>, is given using the equation of free fall, as follows;
Where;
g ≈ Acceleration due to gravity ≈ 9.81 m/s²
By recording the time each rock takes to reach the water surface in the well, the average depth of the well, , can be found by finding the average of the 9 calculated values for <em>h</em> using the 9 stones
Therefore;
The scientific question that is specific and testable is <u>how </u><u>deep </u><u>is the </u><u>well</u><u>, or what is the well's depth</u>
Learn more about scientific method here:
To solve this problem we will use the Ampere-Maxwell law, which describes the magnetic fields that result from a transmitter wire or loop in electromagnetic surveys. According to Ampere-Maxwell law:
Where,
B= Magnetic Field
l = length
= Vacuum permeability
= Vacuum permittivity
Since the change in length (dl) by which the magnetic field moves is equivalent to the perimeter of the circumference and that the electric flow is the rate of change of the electric field by the area, we have to
Recall that the speed of light is equivalent to
Then replacing,
Our values are given as
Replacing we have,
Therefore the magnetic field around this circular area is