Answer:
These energy exchanges are not changes in kinetic energy. They are changes in bonding energy between the molecules. "If heat is coming into a substance during a phase change, then this energy is used to break the bonds between the molecules of the substance
 
        
                    
             
        
        
        
You need to set their position functions equal to one another and so for the time t when that is true. That is when the tiger and the deer are in the same place meaning the tiger catches the dear
Xdear= 2t+15 deer position function. 
(I integrated the velocity function )
To get the Tigers position function you must integrate the acceleration twice. This becomes 
Xtiger=t^2
Now t^2=2t+15 
Time t is when the tiger catches the deer
t^2-2t-15=0
(t-5)(t+3)=0 factored
t=5s is the answer you use (t=-3 is a meaningless solution)
        
             
        
        
        
Answer:
1. 200 metres West
2. Dividing distance by time 
3. Speed was unchanged
4. 1800 metres
5. 15 seconds
Explanation:
Running 500 metres West puts you 500 Metres west from the start. Then running 300 metres east puts you 200metres from where you started.
Since displacement is the distance you are from your original position 200 Metres West is the answer
2. Distance = Speed x Time
 Rearrange that to get Speed = Distance / Time
3. Acceleration is when the rate of increase or decrease of speed or the direction is changing. When the speed or sirection dont change acceleration is 0
4. Distance = Speed x Time
 60 x 30 = 1800 metres
5. Time = Distance / Speed
 300 / 20 = 15 seconds
 
        
             
        
        
        
Answer:
correct answer is D
Explanation:
answer is perihelion and aphelion