A headlight runs on three 1.5V AAA alkaline batteries. It is specified to give 0.25 lux at 2 m and can last for 75 hours. You are wearing the headlight and reading a map a. Calculate the illuminance (in lux) on a map located 50 cm away from your head, where the angle between the normal of the map and the direction of light is 20°.
b. Calculate the luminous flux (in lumen) of the headlight if the light is projected uniformly in a cone with an angle between the sides of 160°. See the diagram below.
c. Calculate the luminous efficacy of the lamp (in lm/W) if a typical AAA alkaline battery has a capacity of 1 Ah (Ampere hour).

vapour or gas assuming atmospheriv pressure

a 2,000 calorie based diet.

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.