hi <3
i believe i explained this answer properly in my last answer but it would be 4kg and 2400m as these are the SI units for these values. 
hope this helps :)
 
        
                    
             
        
        
        
Answer:
reliability
accuracy
Explanation:
If a reading of a measurement is consistently the same then the measurement is reliable.
If a reading of measurement is close the actual value of the measurement then the reading is accurate.
Here, a stationary tree shows reading 6 mph once and 0 mph another instant. So, neither the reading of a measurement is consistent not the reading of measurement is close the actual value.
Hence, the radar has problems in its reliability and accuracy
 
        
             
        
        
        
Answer:
c. 1600J
Explanation:
The loss in potential energy of the boy is given by:

where
m = 40 kg is the mass of the boy
g = 9.8 m/s^2 is the acceleration of gravity
 is the total change in the height of the boy (4 metres + 2 cm due to the compression of the spring)
 is the total change in the height of the boy (4 metres + 2 cm due to the compression of the spring)
Substituting, we find

 
        
             
        
        
        
Answer:
A
Explanation:
A. The molecules that make up olive oil are longer than those that
make up alcohol, so they have more resistance to sliding past one
another.
Olive oils are unsaturated fats with many carbons whereas, alcohols are typically short with very few carbons.