
The equivalent gravitational force is ~

We know that ~

where,
 = mass of 1st object = 500 kg = mass of 1st object = 500 kg
 = mass of 2nd object = 20kg = mass of 2nd object = 20kg
- G = gravitational constant =  
- r = distance between the objects = 2.12 m
Let's calculate the force ~
 
        
             
        
        
        
Mass (m)=55kg
acceleration (a)=9.81 m/s^2, this is the acceleration due to gravity.
initial velocity=0m/s. The skydiver doesn’t start with any speed because she is on the plane or helicopter. 
final velocity=16m/s This is the velocity (speed) the skydiver reaches
The equation we use is KE=.5mv^2
Kinetic energy=.5 mass x velocity^2
KE=.5(55kg)(16m/s)^2
KE=.5(55kg)(256m/s)
KE=.5(14080J)
J=Joules
KE=7040J
Kinetic energy is 7040 Joules (J)
Hope this helps
        
             
        
        
        
One is chemo. Chemo is a special magnetic field like to treat cancer
 
        
                    
             
        
        
        
You look up the element in the periodic table. Subtract the atomic number (small number) from the mass number (big number). The answer is the number of neutrons.
        
             
        
        
        
Answer:
water
Explanation:
water is not an element, it is a molecule