The correct answer is D He could pull the mass down farther.
Amplitude, is the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position. So to increase the amplitude the spring should be pulled down further which can increase the amplitude.
 
        
                    
             
        
        
        
Answer:
acidic
Explanation:
because the lower you go on the scale the more acidic it is and the closer to the middle the more neutral it is 
 
        
                    
             
        
        
        
Explanation:
we are not given the pressure change, check yhe question please
 
        
             
        
        
        
Answer:
 M
M
Explanation:
To apply the concept of <u>angular momentum conservation</u>, there should be no external torque before and after
As the <u>asteroid is travelling directly towards the center of the Earth</u>, after impact ,it <u>does not impose any torque on earth's rotation,</u> So angular momentum of earth is conserved
⇒
-   is the moment of interia of earth before impact is the moment of interia of earth before impact
-   is the angular velocity of earth about an axis passing through the center of earth before impact is the angular velocity of earth about an axis passing through the center of earth before impact
 is moment of interia of earth and asteroid system is moment of interia of earth and asteroid system
 is the angular velocity of earth and asteroid system about the same axis is the angular velocity of earth and asteroid system about the same axis
let  
since 

⇒ if time period is to increase by 25%, which is  times, the angular velocity decreases 25% which is
 times, the angular velocity decreases 25% which is  times
  times
therefore  
  
 
 (moment of inertia of solid sphere)
(moment of inertia of solid sphere)
where M is mass of earth
            R is radius of earth

(As given asteroid is very small compared to earth, we assume it be a particle compared to earth, therefore by parallel axis theorem we find its moment of inertia with respect to axis)
where  is mass of asteroid
 is mass of asteroid
⇒ 
 
 
  =
=  +
+ 
 
 
⇒

 
        
             
        
        
        
Answer:
At time 10.28 s after A is fired bullet B passes A.
Passing of B occurs at 4108.31 height.
Explanation:
Let h be the height at which this occurs and t be the time after second bullet fires.
Distance traveled by first bullet can be calculated using equation of motion

Here s = h,u = 450m/s a = -g and t = t+3
Substituting
 

Distance traveled by second bullet
Here s = h,u = 600m/s a = -g and t = t
Substituting

Solving both equations

So at time 10.28 s after A is fired bullet B passes A.
Height at t = 7.28 s

Passing of B occurs at 4108.31 height.