Answer:

Explanation:
Given,
Magnetic field, B = 5 x 10⁻⁵ T 
Number of turns, N = 450 
length = 29 cm
Current,I = ?
Using formula of magnetic field due to solenoid
 



Hence, the current obtained is equal to 0.0256 A.
 
        
             
        
        
        
Answer:
the ball didn't not reach the Maximum height because of the time interval
 
        
             
        
        
        
Oxygen and carbon dioxide
        
             
        
        
        
Answer:
(C) Average Velocity = 25 m/s due North 
 
        
                    
             
        
        
        
Answer:
300 m
Explanation:
The train accelerate from the rest so u = 0 m/sec
Final speed that is v = 80 m/sec 
Time t = 30 sec 
The distance traveled by first plane = 1200 m 
We know the equation of motion  where s is distance a is acceleration and u is initial velocity
 where s is distance a is acceleration and u is initial velocity 
Using this equation for first plane 

As the acceleration is same for both the plane so a for second plane will be 2.67 
The another equation of motion is  using this equation for second plane
 using this equation for second plane 
s = 300 m