What can bloodstain patterns tell an investigator? Bloodstain pattern analysis (BPA) is the interpretation of bloodstains at a crime scene in order to recreate the actions that caused the bloodshed. Analysts examine the size, shape, distribution and location of the bloodstains to form opinions about what did or did not happen. What type of evidence […]
What is the relation between the angle of incidence and the angle of deviation?
What is the relation between the angle of incidence and the angle of deviation? The angle through which the emergent ray deviates from the direction of incident ray is called angle of deviation ‘d’. As the angle of incidence is increased, angle of deviation ‘d’ decreases and reaches minimum value. If the angle of incidence […]
What happens if you breathe in volcanic ash?
What happens if you breathe in volcanic ash? Inhalation of volcanic ash can be very detrimental to human health, due to the harmful aerosols and poisonous gases the ash is made up of. Health effects inlcude respiratory problems, eye problems, and skin irritiation. One long-term effect of volcanic ash is silicosis. How dangerous is ash […]
What bank angle is a rate 1 turn?
What bank angle is a rate 1 turn? The bank angle required to conduct a turn at a specific rate is directly proportional to True Airspeed (TAS). The approximate bank angle required to accomplish a coordinated rate one turn (3°/second) can be calculated by dividing the TAS (in knots) by 10 and then adding 7. […]
How does a Punnett squares allow you to predict gametes and offspring?
How does a Punnett squares allow you to predict gametes and offspring? A Punnett square is a chart that allows you to easily determine the expected percentage of different genotypes in the offspring of two parents. The gametes produced by the male parent are at the top of the chart, and the gametes produced by […]
What are the 5 types of natural selection?
What are the 5 types of natural selection? Stabilizing selection, directional selection, diversifying selection, frequency -dependent selection, and sexual selection all contribute to the way natural selection can affect variation within a population. What is the rarest pattern of natural selection? The shape comes from the fact that both extremes are selected for during disruptive […]
How big asteroid that killed the dinosaurs?
How big asteroid that killed the dinosaurs? It was tens of miles wide and forever changed history when it crashed into Earth about 66 million years ago. The Chicxulub impactor, as it’s known, was a plummeting asteroid or comet that left behind a crater off the coast of Mexico that spans 93 miles and goes […]
How do you size a disconnect?
How do you size a disconnect? How to Calculate the Electrical Disconnect Switch Size Examine the appliance manufacturer nameplate on the appliance. Determine the horsepower rating of the appliance. Convert from volt-amps, watts or kilowatts to horsepower. Divide watts or volt-amps by 745.7 to obtain horsepower. Select a disconnect switch with the same or greater […]
What are the pros and cons of wind energy?
What are the pros and cons of wind energy? Pros and cons of wind energy Pros of wind energy Cons of wind energy Renewable & clean source of energy Intermittent Low operating costs Noise and visual pollution Efficient use of land space Some adverse environmental impact What are the negative effects of wind energy? As […]
How accurate are dial calipers?
How accurate are dial calipers? Quality dial, Vernier or digital calipers can all return an accuracy of about 0.001 inch over 6 inches if correctly used, although the accuracy is likely to diminish over longer spans. What are the 3 ways a dial caliper can be used to measure? There are 4 measurements you can […]