Answer:
The value is 
Explanation:
From the question we are told that
The length of the wire is 
The current density is 
The conductivity is
Generally conductivity is mathematically represented as

Here R is the resistance which is mathematically represented as

Here I is the current which is mathematically represented as

So

And

=> 
=> 
=> 
=> 
Answer:
Explanation:
Given
Train travels towards south with a velocity if 
Rain makes an angle of
with vertical
If an observer sees the drop fall perfectly vertical i.e. horizontal component of rain velocity is equal to train velocity
suppose
is the velocity of rain with respect to ground then



Therefore velocity of rain drops is 27.36 m/s
Answer:
(a) 172.185 N
(b) 
Solution:
As per the question:
Mass of the child, m = 22.0 kg
Angle, 
Now,
(a) The magnitude of the normal force exerted by the slide on the child:


Now,
(b) The angle from the horizontal at which the force is directed is:

Answer:
C. Car A
Explanation:
if the answer is: which roller coaster car has the greatest potential energy due to gravity brainly