ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements. In working this problem, assume the value of "g" to be 9.8 m/s2 with two (2) significant digits unless otherwise stated. If steam enters a turbine at 600°K and is exhausted at 200°K, calculate the efficiency of the engine. a.33.3%
b.66.7%​

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray