If they want to increase the money supply<span> in the economy it </span>will<span> buy securities. Conversely, if the they want to </span>decrease the money supply<span>, it </span>will<span> sell securities.</span>
        
             
        
        
        
Answer: High tides and low tides are caused by the Moon. The Moon's gravitational pull generates something called the tidal force. The tidal force causes Earth—and its water—to bulge out on the side closest to the Moon and the side farthest from the Moon. These bulges of water are high tides.
Explanation:
 
        
             
        
        
        
Momentum = mass x velocity so if velocity is kept same and mass is increased then momentum will increase.
        
             
        
        
        
Answer: Metal. There are six of them.  inclined plane, the wedge, the screw, the lever, the wheel and axle, and the pulley.
Hope this helps!
~Jarvis
Explanation:
 
        
             
        
        
        
D = distance between th two trains at the start of the motion = 100 miles
V = speed of the faster train towards slower train = 60 mph 
v = speed of the slower train towards faster train = 40 mph 
t = time taken by the two trains to collide = ?
 time taken by the two trains to collide is given as 
t = D/(V + v)
t = 100/(60 + 40) = 1 h 
v' = speed of the bird = 90 mph 
d = distance traveled by the bird
distance traveled by the bird is given as 
d = v' t 
d = 90 x 1 
d = 90 miles