The compass is designed and developed to use a pendulous system to improve horizontality.
<h3>What is a compass?</h3>
A compass can be defined as a scientific instrument that contains a magnetized pointer, which is used to show and indicate the following four (4) main cardinal directions:
Basically, the compass is a scientific instrument that's designed and developed to use a pendulous system to improve horizontality.
Read more on compass here: brainly.com/question/11165627
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Answer:
  r = 102.43 m
Explanation:
Newton's second law for this case is
               F = ma
Where the acceleration is centripetal
             a = v² / r
             r = v² / a
They indicate that the radial acceleration is 8.45 g
            r = v² / 8.45 g.
            r = 92.1² / 8.45 9.8
            r = 102.43 m
 
        
             
        
        
        
Answer:
To achieve the velocity of 40 m/sec height will become 4 times   
Explanation:
We have given initially truck is at rest and attains a speed of 20 m/sec
Let the mass of the truck is m 
At the top of the hill potential energy is mgh and kinetic energy is 
So total energy at the top of the hill 
At the bottom of the hill kinetic energy is equal to  and potential energy will be 0
 and potential energy will be 0 
So total energy at the bottom of the hill is equal to 
Form energy conservation 
 , for v = 20 m/sec
, for v = 20 m/sec

Squaring both side

h = 20.408 m 
Now if velocity is 0 m/sec


h = 81.63 m 
So we can see that to achieve the velocity of 40 m/sec height will become 4 times
 
        
             
        
        
        
From reliable sources in the internet, the half-live of carbon-14 is given to be 5,730 years. In a span of 10,000 to 12,000 years, there are almost or little more than 2 half-lives. Thus, there should be
                                           A(t) = A(0)(1/2)^t
where t is the number of half-lives, in this case 2. Thus, only about 1/4 of the original amount will be left.