Answer:
3 m
Explanation:
At last, Same line; so, 6-3 = 3
 
        
             
        
        
        
Answer:
is a reflection.
The image is real light rays actually focus at the image location). As the object moves towards the mirror the image location moves further away from the mirror and the image size grows (but the image is still inverted). When the object is that the focal point, the image is at infinity.
Explanation:
 
        
                    
             
        
        
        
Explanation: Evaporation happens when a liquid substance becomes a gas. When water is heated, it evaporates. The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor (Dunn,1993).
        
                    
             
        
        
        
Answer:
It does not hit the students face because the speed of the balloon slows down as energy is lost through thermal.
Explanation:
 
        
             
        
        
        
By the definition of wavelength, the answer is the letter D, the wavelength would decrease.
We can see in the diagram a wave motion. 
A wave has some characteristics:
- Has an amplitude, the distance from 0 to the crest (highest point in the y-direction, point (3) in the figure) it would see in the figure as (2)
- Has wavelength, the distance between the crests. 
- Has a trough, the lowest point in the y-direction.
Now, if we increase the distance of the crests, by the definition shown above, we will increase the wavelength. 
Therefore, the answer is letter D, the wavelength would increase.
You can learn more about wave motion here:  
brainly.com/question/22763521