The protons in the atom must differ between the atom of 2 different elements
The story sure is exciting. But when you're ready to work on answering the question, you can ignore everything before the assumptions.
-- When the pilot hit the snow, he was allegedly falling at 50 m/s.
-- His mass is 85 kg.
-- So his kinetic energy was (1/2) (mass) (speed squared) =
(1/2) (85) (50)² = <em>106,250 joules</em>
-- That's the energy that something else has to absorb in order to
reduce his speed to zero.
-- How far he fell, or what size crater he made in the snow, are irrelevant.
Answer: B. illuminance of a surface.
Explanation:
A. Luminous flux is the quantity of the energy of the light emitted per second in all directions.
B. Illuminance of a surface describes the quantity of light emitted by a light source or received at a surface.
C. Incandescence is The phenomenon of light emission by a body as a result of high temperature.
D. luminous intensity is the quantity of visible light that a point source radiates in a given direction.