Society has become increasingly dependent on electricity over the last 200 years Random Keywords: Independent Variable: variable that is changed Dependent Variable: thing that changes with independent variable, it is what you measure Control Variables: variable held constant for reference Validity or valid: the extent to which a measurement accurately reflects the concept, which is intended to measure Accuracy: how close your measurement or results are to the true value Reliability: the extent to which a measurement yields consistent stable and uniform results over repeated observations or measurements. Domestic energy and how it has changed * The first sources of electrical energy were batteries, which …show more content…
ric Field Definition of electric field (E) at a point in space: the electric force (F) acting on a positive test charge placed at that point divided by the magnitude of the test charge q0 E = F ----- q0 E = F ----- q0 * Where k is a constant called coulomb constant * The unit of charge in SI units is the (C) * k = (approximately) 9.0 x 109 N.m2/C2 Electric Field * Electric field lines are a convenient way to visualize electric field patterns * It is shown by drawing the electric field at any point (Einstein just got smarter) * If the lines of force are close together it indicated that the field is strong and therefore where the field lines are further apart it indicates that the field is weak The rules for drawing electric field lines for any charge distribution * You must always begin on a positive charge and terminate on a negative one, infinity may be considered in the case of an excess charge * The number of lines drawn leaving a positive charge or approaching a negative charge is proportional to the magnitude of the charge * No field line can cross Electric field lines for a positive point charge * The lines in an electric field are not actually two dimensional but are directed radially outward from the charge in all directions * Since a positive test charge placed in this field would be repelled by the charge q, the line are directed radially away from the
Click here to unlock this and over one million essays
Get AccessWhat do the red lines along the edge represent? What do the blue lines along the edge represent?
(Measureable) quality is being measured by scores (areas are being identified by scores of either higher or lower)
| (TCO A,B,C) The measure of how well a property is designed to do the job it is intended to perform is called _________________ .
A lesser amount of Potassium ions diffuse out across the membrane, leaving behind a less negative charge. The
4) This line is much like a line on a geologic topo map. Explain the similarity.
Lines are paths or marks left by moving points and they can be outlines or edges of shapes and forms. Lines have qualities which can help communicate ideas and feelings such as straight or curved, thick or thin, dark or light, and continuous or broken. Implied lines suggest motion or organize an artwork and they are not actually seen, but they are present in the way edges of shapes are lined up.
3) Explain the so-called ‘Divided Line’. What do the different levels mean? How does this apply to
The picture to the left is an example of using lines to lead the viewers eye. The actual line in the center of the page directs the eye up the picture to the mountains. The
Comparison – the metrics taken during Measurement are compared, both against each other and against a defined or identified ideal to determine the need for adjustment.
• The vector resolute (or component) of a ˜ ˆ ˆ perpendicular to b is equal to a − ( a.b)b. ˜ ˜ ˜ ˜ ˜
There are over 30,000 accelerators around the world, and they use the designs above. (Witman, 2015) Electrostatic Accelerators were the first particle accelerators ever made. These designs use circle paths to accelerate the particles expect the linear accelerator. The circle paths are used because they will take up
In a DC electric field, charged particles moves to an electrode that has anwith opposite polarity. In an AC electric field, charged particles oscillate, and their amplitudes are determined by the amount of the total particle charge.
The accuracy of a measurement system defined as how close the measurement compare to its true value. This can be