Answer:
Entropy is increasing. Entropy is decreasing.
Explanation:
The Entropy doesn't change.
Visual aids are tools that help to make an issue or lesson clearer or easier to understand and know (pictures, models, charts, maps, videos, slides, real objects etc.). ... Visual aids are those devices which are used in classrooms to encourage students learning process and make it easier and interesting.
Answer:
The observer detects light of wavelength is 115 nm.
(b) is correct option
Explanation:
Given that,
Wavelength of source = 500 nm
Velocity = 0.90 c
We need to calculate the wavelength of observer
Using Doppler effect

Where, 


Hence, The observer detects light of wavelength is 115 nm.
The average speed of the football is 15 meters per second. Just divide both of the numbers by 4 :)
kinetic energy is Movement energy
think of it like the Xbox Kinect