<span>Antimony I am pretty sure is one. </span>
        
             
        
        
        
Explanation:
Constant speed means that the object is covering equal distance in equal interval of time. The motion is called uniform motion for such case. In this problem, it is given that an object is moving with a constant speed of 8 m/s. It means that it does not change its speed. It is moving with a single speed constantly. 
We can say that it moves 8 meters every second or 800 cm every second. 
 
        
             
        
        
        
Answer:
the answer is 
Explanation:For equilibrium
Weight = Tension
mg=T
∴T=4×3.1π=12.4πN (as can be inferred from the question)
Y= 
△l/l
T/A
 
= 
1000
0.031
 /20
12.4π/π( 
1000
2
 ) 
2
 
 
= 
4×0.031
12.4×20×1000×(1000) 
2
 
 
=2×10 
12
 N/m 
2
 
        
             
        
        
        
Geostrophic winds blows parallel to the isobars. That is because the Coriolis force and pressure gradient force ( PGF ) are in balance. But near the surface the friction can act to change the direction of the wind and to slow it down. Coriolis force decreases at the surface and PGF stays the same. The difference in terrain conditions affects how much friction is exerted. Hills and forests force the wind to change direction more than flat areas. Answer: Friction reduces the speed so Coriolis is weakened.