milligrams
Explanation:
The best unit to measure the mass of a grain of salt is the milligram. 
This is about; a thousandth of a gram. 
   A grain of salt is a very small particle size that can still be visible with the eye.
It has a very low and small mass. 
 For substances like this, we use the milligram: 
              1000milligram  = 1g
learn more: 
Mass brainly.com/question/4736384
#learnwithBrainly
             
 
        
             
        
        
        
The right answer for the question that is being asked and shown above is that: "The image produced is virtual and of the same size as the object." the image if the object is shifted closer to the lens to a point one focal length away from it is that The image produced is virtual and of the same size as the object.<span>
</span>
        
                    
             
        
        
        
The era that dinosaurs came was in the Mesozoic Era!
        
                    
             
        
        
        
Answer:

Explanation:
Since  , we calculate the resistance rate by deriving this formula with respect to time:
, we calculate the resistance rate by deriving this formula with respect to time:

Deriving what is left (remember that  ):
):

So we have:

Which for our values is (the rate of <em>I(t)</em> is decreasing so we put a negative sign):

 
        
             
        
        
        
The distance covered by an object accelerating from rest is
D = (1/2) · (acceleration) · (time)² .
In this particular case, 'acceleration' is 9.8 m/s² ... due to gravity.
D = (1/2) · (9.8 m/s²) · (1.67 s)²
D = (4.9 m/s²) · (2.789 s²)
D =  13.67 meters