We need more evidence to be provided
        
             
        
        
        
Answer:
5900J
Explanation:
Work=Forse*Distance
work = J, Jewls
100*59=5900
Hop this helps and can u think about brainlist
i put a picture on how to find these answers, if u got any more questions im here
 
        
             
        
        
        
Answer:
Explanation:
Let m be mass of each sphere and θ be angle, string makes with vertex in equilibrium. 
Let T be tension in the hanging string 
T cosθ = mg ( for balancing in vertical direction )
for balancing in horizontal direction
Tsinθ = F ( F is force of repulsion between two charges sphere)
Dividing the two equations 
Tanθ = F / mg 
tan17 = F / (7.1 x 10⁻³ x 9.8)
F = 21.27 x 10⁻³ N 
if q be charge on each sphere , force of repulsion between the two
F = k q x q / r² ( r is distance between two sphere , r = 2 x .7 x sin17  = .41 m )
 21.27 x 10⁻³  = (9 X 10⁹ x q²) / .41² 
q² = .3973 x 10⁻¹²
q = .63 x 10⁻⁶ C 
no of electrons required  = q / charge on a single electron 
= .63 x 10⁻⁶ / 1.6 x 10⁻¹⁹
= .39375 x 10¹³
3.9375 x 10¹² . 
 
        
             
        
        
        
Answer:
 0.5kg
Explanation:
Given parameters: 
Potential energy = 147J 
Height  = 30m 
Unknown: 
Mass of the bird  = ? 
Solution: 
Potential energy is the energy due to the position of a body. Now, the expression for finding the potential energy is given as; 
       P.E  = mgH 
m is the mass 
g is the acceleration due to gravity = 9.8m/s² 
H is the height
       147  = m x 9.8 x 30 
          m = 0.5kg
 
        
             
        
        
        

GiveN:
- Initial velocity = 9.8 m/s²
- Accleration due to gravity = -9.8 m/s²
- Time taken = 1 s
To FinD:
- Final velocity of the ball?
Step-by-step Explanation:
Using the first Equation of motion,
⇒ v = u + gt
⇒ v = 9.8 + -9.8(1)
⇒ v = 0 m/s 
The final velocity is hence <u>0</u><u> </u><u>m</u><u>/</u><u>s</u><u>.</u>
<h3>
Note:</h3>
- While solving questions of under gravity motions using equations of motion, remember the sign convection to avoid mistakes.
- You can consider positive above the ground and negative for towards it.