The first opiton is the answer A)<span>Rahul’s weight
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Answer:
The average velocity is 7.5 km/h
Explanation:
Let's convert minutes to hours so our answer can be given in a common units of km/hour: 
12 minutes = 12/60  hours = 0.2 hours
Now we estimate the average velocity calculating the distance travelled over the time it took:
1.5 / 0.2 km/h = 7.5 km/h
 
        
             
        
        
        
Answer:
False
Explanation:
Sievert is the unit of dose equivalent
 
        
             
        
        
        
The answer is evolution. When a specifies evolves over time they change and adapt to their environment.
        
                    
             
        
        
        
Answer:
1.87 A
Explanation:
τ = mean time between collisions for electrons = 2.5 x 10⁻¹⁴ s
d = diameter of copper wire = 2 mm = 2 x 10⁻³ m 
Area of cross-section of copper wire is given as 
A = (0.25) πd²
A = (0.25) (3.14) (2 x 10⁻³)²
A = 3.14 x 10⁻⁶ m²
E = magnitude of electric field = 0.01 V/m 
e = magnitude of charge on electron = 1.6 x 10⁻¹⁹ C 
m = mass of electron = 9.1 x 10⁻³¹ kg 
n = number density of free electrons in copper = 8.47 x 10²² cm⁻³ = 8.47 x 10²⁸ m⁻³ 
 = magnitude of current
 = magnitude of current 
magnitude of current is given as 


 = 1.87 A
  = 1.87 A