The metalcore is the central component of any metal that is covered by wires. Metalcore is found in the X denoted area. 
<h3>What is a solenoid?</h3>
 A solenoid is a coil of wire that conducts an electric current. A solenoid is an electromagnet made out of a wire or helical coil. 
When an electric current is sent through the coil, it produces a magnetic field. A solenoid is a coil that generates a magnetic field when an electric current passes through it. 
When a conductive wire is used to build a loop, a solenoid is formed. 
Hence the metalcore is found in the given X area.
To learn more about the solenoid refer to the link ;
brainly.com/question/16015159
 
        
             
        
        
        
A Porsche will always win no matter what
        
             
        
        
        
Answer:
solution:
to find the speed of a jogger use the following relation:  
V
=
d
x
/d
t
=
7.5
×m
i
/
h
r
...........................(
1
)  
in Above equation in x and t. Separating the variables and integrating,
∫
d
x
/7.5
×=
∫
d
t
+
C
or
−
4.7619  
=
t
+
C
Here C =constant of integration.   
x
=
0  at  t
=
0
, we get:  C
=
−
4.7619
now we have the relation to find the position and time for the jogger as:
−
4.7619  =
t
−
4.7619
.
.
.
.
.
.
.
.
.
(
2
)
Here 
x  is measured in miles and  t  in hours.
(a) To find the distance the jogger has run in 1 hr, we set t=1 in equation (2),     
      to get:
       = −
4.7619  
       =  
1
−
4.7619
       = −
3.7619
   or  x
=
7.15
m
i
l
e
s
(b) To find the jogger's acceleration in   m
i
l
/
 differentiate  
      equation (1) with respect to time.
      we have to eliminate x from the equation (1) using equation (2).   
      Eliminating x we get:
      v
=
7.5×
      Now differentiating above equation w.r.t time we get:
       a
=
d
v/
d
t
        =
−
0.675
/
       At  
       t
=
0
       the joggers acceleration is :
        a
=
−
0.675
m
i
l
/
         =
−
4.34
×
f
t
/  
(c)  required time for the jogger to run 6 miles is obtained by setting  
         x
=
6  in equation (2).  We get:
         −
4.7619
(
1
−
(
0.04
×
6  )
)^
7
/
10=
t
−
4.7619
          or
          t
=
0.832
h
r
s