Answer:
1) i. All these technologies use radio waves, including high-frequency microwaves.
ii. Microwave ovens emit in the same frequency band as some wireless Internet devices.
2. B. The earth absorbs visible light and emits radiation with a longer wavelength.
Explanation:
Electromagnetic radiations are generated when there is an interference between electric and magnetic fields traveling at right angles to each other. All electromagnetic waves forms a spectrum with respect to their frequency and wavelength. The higher the wavelength, the lower the frequency.
All these waves move with the same and constant speed, but are generated from different sources. From the given applications, X-ray has a high frequency, but low wavelength.
In the second case, infrared waves have longer wavelength than visible light.
It can be both flat or it can be when you have new eyeglasses on and you look down it makes you think the ground looks like that but its not
Answer:
Explanation:
Given
mass 
(inclination)=
Let T be the tension in the rope
From Diagram
-----------------1
where 
For block 
-----------2
From 1 & 2
