Answer: C. illuminance of a surface.
a) Incandescence: The phenomenon of light emission by a body as a result of high temperature.
B. Luminous flux : It is the quantity of the energy of the light emitted per second in all directions.
C. Illuminance of a surface :describes the quantity of light emitted by a light source or received at a surface.
D. luminous intensity : the quantity of visible light that a point source radiates in a given direction.
Air mass abbreviated Cp has cold temperature and dry moisture.
Explanation:
Air mass abbreviated Cp means regions of continental polar or continental arctic. So mostly in the northern hemisphere where the temperature is very low like in Alaska, the mass of air is termed as Cp. At those low temperature, the temperature is very cold and so the moisture present in the air in those regions will be dry in nature. Mostly, they originate in the northern hemisphere like in canada, Alaska and then they will spread toward the south and east directions.
So they air masses present in those cooler regions are extremely cold and has dry moisture.
Answer:
A: The wave is a mechanical wave.
C: The wave moves energy through matter.
F: The wave transfers energy perpendicular to the motion of the wave.
Mary walks:
d 1 = 80 m, d 2 = 125 m, d 3 = 45 m
t = 10 minutes = 600 seconds;
Average speed:
v = ( d 1 + d 2 + d 3 ) / t
v = ( 80 m + 125 m + 45 m ) / 600 s
v = 250 m / 600 s
v = 0.4167 m/s ≈ 0.42 m/s
Answer:
E ) 0.42 meters/second