Answer:
The distance travel by block before coming to rest is 0.122 m
Explanation:
Given:
Mass of block  kg
 kg
Initial speed of block  
 
Final speed of block  
 
Coefficient of kinetic friction 
Ramp inclined at angle  28.4°
 28.4°
Using conservation of energy,
Work done by frictional force is equal to change in energy,
   
Where 
 
 

   m
 m
Therefore, the distance travel by block before coming to rest is 0.122 m
 
        
             
        
        
        
Answer:
A. The number of valence electrons increases by 1.
Explanation:
As you move across any period on the periodic table, the number of valence electrons increases by a value of 1. 
- The periodic table of elements contains an arrangement of element by their atomic numbers. 
- From left to right, number of valence electrons increases. 
- Down a group, the valence electrons are the same. 
- Across a period, the number of valence electrons increases. 
 
        
                    
             
        
        
        
Complete Question
In the year 1178, five monks at Canterbury Cathedral in England observed what appeared to be an asteroid colliding with the moon, causing a red glow in and around it. It is hypothesized that this event created the crater Giordano Bruno, which is right on the edge of the area we can usually see from Earth.
How long after the asteroid hit the Moon,which is  away ,would the light first arrive on the earth in seconds
 away ,would the light first arrive on the earth in seconds
Answer:
The time it would take is  
Explanation:
The objective of this question is to obtain the time the light would arrive earth 
       We are told that the distance from moon to  earth is  
                   
Now generally time is mathematically represented as 
                           
The c here is the speed of light which has a value of 
         Now substituting values 
                         
                            