Answer:
Creatine is a great option , its not gonna help long term running ; but a great boost when you first start the run/jog.
Now to run faster you have to build great endurance and that is done through constant exercise running and stamina work outs such as sports , sprints calistetics etc.
Explanation:
Its not a simple 1 time thing and your suddenly , it takes drive and motivation !
Hope i was able to help you out ! Have a great day :)
 
        
             
        
        
        
Answer:
310.5 J
Explanation:
The total work done by Martha is equal to the increase in gravitational potential energy of the package, which is equal to

where
(mg) = 45 N is the weight of the package
 is the increase in height of the package
 is the increase in height of the package
The package is carried up 3 flights of stairs, each one with a height of 2.3 m, so the total increase in heigth is

And so, the work done by Martha is

 
        
             
        
        
        
Answer:
dam 15 marks for that question that's ez marks there
 
        
             
        
        
        
Answer:
option (d)
Explanation:
The relation between the rms velocity and the molecular mass is given by 
v   proportional to  \frac{1}{\sqrt{M}} keeping the temperature constant 
So for two gases




 
        
             
        
        
        
Answer:
The second projectile was 1.41 times faster than the first. 
Explanation: 
In the ballistic pendulum experiment, the speed (v) of the projectile is given by:  
 
 
<em>where m: is the mass of the projectile, M: is the mass of the pendulum, g: is the gravitational constant and h: is the maximum height of the pendulum.   </em>
To know how many times faster was the second projectile than the first, we need to take the ratio for the velocities for the projectiles 2 and 1:    
 (1)
           (1) 
<em>where m₁ and m₂ are the masses of the projectiles 1 and 2, respectively, and h₁ and h₂ are the maximum height reached by the pendulum by the projectiles 1 and 2, respectively.  </em>
Since the projectile 1 has the same mass that the projectile 2, we can simplify equation (1): 
 
  

 
  
Therefore, the second projectile was 1.41 times faster than the first.  
I hope it helps you!