Mechanical energy 
I think
        
             
        
        
        

Strength: able to detect planets in a wide range of orbits, as long as orbits aren't face on 
Limitations: yield only planet's mass and orbital properties
 
        
             
        
        
        
Answer:
Explanation:required formula is 
W 1=F*S
W1=work done by Sam =? 
F=force applied by sam=150N
S=displacement =10m
again 
W2=F*S
W2=work done by friction =? 
S=displacement =10m
F=friction =25N
W=W1-W2=net work done 
please feel free to ask if you have any questions 
 
        
             
        
        
        
The answer is: 
Heat transfer.In order to heat up water there has to be a way that the heat puts energy into the water,which make is rise in temperature. 
I hope this helps :D 
        
                    
             
        
        
        
Answer:
option C
Explanation:
given,
mass of water = 4 Kg
Water is heated to = 800 W
time of immersion = 10 min 
                               = 10 x 60 = 600 s 
using equation of specific heat  
Q = m S ΔT
S is the specific heat capacity of water which is equal to 4182 J/kg°C.
and another formula of heat 
Q = Pt
now,
P t =  m S ΔT
800 x 600  = 4 x 4182 x ΔT
ΔT = 29° C
temperature increased is equal to ΔT = 29° C
Hence, the correct answer is option C