Physics, 14.01.2020 03:31, Lydiac8715

Kelly is measuring an object with a metric ruler. to minimize parallax, she should

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Kelly should position the ruler such that the border of the ruler would be against the thing. The parallax error occurs whenever the distance of objects is measured to be less or more than the initial length of this same object.Whenever a viewer watches an element at such an oblique angle corresponding towards the scale, it appeared together in changed or modified location on some kind of scale.

Thus the approach above is right.

Learn more about parallax here:

link

answered: memester74

To minimize parallax, she should Place the ruler in such a way that the edge is against the object.

Explanation:

When the measurement of the length of an object is lesser or greater than the original length of that object, then the Parallax error happens. The main reason for the occurrence of this type of error is due to the wrong position of eyes to the measurement marking angle. On a scale, an object appears at a different or modified position,When a person views an object at an oblique angle corresponding to the scale. This is where the parallax error comes in existence.

This error can be minimized by placing the device used for measurement on the edge. This will result in making the same level for the device for measurement and the object that is to be measured.

answered: Guest

most voltage drop calculators want the distance between the source and destination. then internally, they double it so both the source and return wires are calculated. but you need to know which distance the calculator uses so you're not half of what you should be or double what you should be.

most circuit breakers will not take a #6 directly, so the electrician will have to splice on a smaller pigtail. you also have to upsize the grounding wire when you upsized the ungrounded (hot) wire (see note in 250.122). this will preclude using most cable assemblies, as a cable with #6 copper will most likely only have a #10 grounding conductor. you need a #6 grounding conductor if the circuit is 20a. a #8 cable is no better, as it will have a #10 grounding conductor too. but most 20a breakers will take a #8 directly.

in your related post, you didn't say what type of load this is. if it is a light or heater, voltage drop won't be a big issue. if this is a motor, the current needs are huge at startup and the voltage drop can pose a problem. if this is a motor, knowing if the motor is under much load during startup will answer the voltage drop effect (a saw is easier to start than a compressor).

answered: Guest

$efficiency \: = \frac{useful \: energy \: output}{total \: energy \: input} \ \times$ $100$ therefore, the efficiency is: $\frac{222}{222} \times 100$ $= 100\%$

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Kelly is measuring an object with a metric ruler. to minimize parallax, she should...