Light Essay Samples and Topic Ideas
light bulbs have a life time between: Mean- standard deviation=2500-500 =2000 Mean+ standard deviation=2500+500 =3000 An approximate number of 95% have a life of between Mean-2 standard deviations =2500-(2*500) = 1500 and Mean+2 standard deviations=2500+ (2*500) =3500 95.7% of the bulbs have a life of between Mean-3 standard deviations=2500-(3*500) =1000 and Mean +3 standard deviations=2500+3 standard deviations =2500+ (3*500) =4000 This means that 49.85% (95.7%/2) of the bulbs have a life that is inferior to 2500 (mean) Z-score = value – (Mean / SD) =2500-2500 500 =0 From the z table 50% is the corresponding percentile of bulbs with life of less than...
- Words: 825
- Pages: 3
Couldn't find the right Light essay sample?
Order now with discount!
Light microscope 1. When a light microscope with an objective lens of 40X and its ocular lens is 10X, what is the total magnification of the image? The total magnification of an object viewed under a light microscope is the product of the objective lens and ocular lens magnification. Therefore total magnification is 40*10=400X 2. A revolving nose piece is the part of a light microscope positioned right above the stage and holds in position the low power, medium power, and the high power objective lens. Usually, these objective lenses are held in a manner that the revolving nose piece rotates allowing for the required objective lens to be used to achieve the...
light. The peripheral wells in the micro-titer plate were filed with sterile water. Sterile water was use to prevent dehydration in the wells. The wells were classified into two types; experimental and control. The experimental wells were filled with novel antibacterial compounds. However, the control wells consisted of bacterial colony only. The experimental wells were filled with different dilutions of the bacterial colony. Initial dilutions of the novel compounds were achieved with dimethyl sulfoxide. Subsequent dilutions were undertaken in the micro-titer plate. A two-fold dilution was achieved in the micro-titer plate. The experimental and control wells were inoculated with 0.1 ml (105 CFU//ml)...
- Words: 275
- Pages: 1