Answer: Photoelectric wave
Explanation: Because it represents an interaction between light and matter that describes light as an electromagnetic wave.
Physical education is when you are taught about your body and the physical things you can do to keep it healthy. You are taught how to do exercises to keep healthy and what foods you should eat. Physical education means to be educated about your physical abilities and health.
Answer:
Work done W 2.938*10^9 J
Explanation:
given data:
mass m = 944 Kg
Mass of moon M = 7*10^22 Kg
Radius of the moon R = 1.5*10^6 m
gravitational constant G = 6.67*10^{-11} Nm^2/Kg^2
we know that work done is given as
Work done 
= 2.938*10^9 J
2.6 seconds (If acceleration due to gravity is taken 10 m/s^2) or 2.65 (If acceleration due to gravity is taken 9.8 m/s^2)
