The amplitude of a wave tells us about the intensity or brightness of the light relative to other light waves of the same wavelength.
        
                    
             
        
        
        
Answer:
The correct answer is C. 45.5 lbs.
Explanation:
In a second class lever, the load is located between the point in which the force is exerted and the fulcrum.
The formula for any problem involving a lever is: 

Where F_e is the effort force, d_e is the total length of the lever, F_l is the load that can be lifted and d_l is the distance between the point of the effort and the fulcrum.
The parameter of the formula that you need is F_l: 

The conversion from feet to inches is 1 ft is equal to 12 inches. In this case, 5 ft are equal to 60 inches. 

F_l=45.5 lbs
 
        
             
        
        
        
the answer is the first one because neutrons and protons are in the middle of an atom. plz give me brainliest
 
        
             
        
        
        
The ball in the air is for  <u>0.319 sec.</u>
<u />
The horizontal pace of a projectile is regular (in no way converting in value), and there's a vertical acceleration because of gravity; its cost is 9.8 m/s/s, down, The vertical speed of a projectile changes via nine.8 m/s every second, The horizontal motion of a projectile is impartial to its vertical movement.
Projectile motion is a form of motion experienced with the aid of an object or particle that is projected in a gravitational field, such as from Earth's floor, and movements alongside a curved route below the action of gravity best.
Projectile motion is the movement of an object thrown (projected) into the air. After the initial force that launches the item, it most effectively reports the pressure of gravity. The object is known as a projectile, and its route is called its trajectory.
<u />
<u>Calculate:-</u>
<u />
H = ut + 1/2 gt²
Since the vertical initial velocity is 0.
H = 0 +gt²
t = 
  = 
  =<u> 0.319 sec.</u>
Learn more about projectile motion here:-brainly.com/question/10680035
#SPJ4
 
        
             
        
        
        
B. it moves up and down with the load