It’s 49% of its original gig hope this helps!
        
                    
             
        
        
        
The  elastic potential energy  stored in the stretched spring is  1 J.
<h3>What is Hooke's law?</h3>
Hooke's law states that; provided the elastic limit is not exceeded, the extension of the spring is directly proportional to the force on the spring.
Given that;
Force on the spring = 350 Newton
Distance stretched = 7 centimeters or 0.07 m
Hence;
F = ke
k = F/e = 350 Newton/0.07 m = 5000 N/m
Work done in stretching a spring = 1/2ke^2
= 0.5 × 5000 × (2 × 10^-2)^2 =1 J
Learn more about elastic potential energy: brainly.com/question/156316
 
        
             
        
        
        
Answer:
-  path differnce = 2.18*10^-6
-  1538 lines
Explanation:
-  The path difference for the waves that produce the pattern of diffraction, is given by the following formula:
 (1)
            (1)
d: separation between slits = 0.50mm = 0.50*10^-3 m
θ: angle of a diffraction = 0.25°
Then, the path difference is:

- The maximum number of bright lines are calculated by using the following formula:
 (2)
            (2)
m: order of the bright
λ: wavelength = 650nm
The maximum bright is calculated for an angle of 90°:

The maxium number of bright lines are twice the previous result, that is, 1538 lines
 
        
                    
             
        
        
        
B. Refraction because objects refract in water
        
             
        
        
        
Answer:
Masa, m = 0.088 kg
Explanation:
Given the following data;
Temperatura inicial = 30°C
Temperatura final = 120°C
Capacidad calorífica específica = 138J/kg.K
Calor absorbido, Q = 4400 cal.
Para encontrar la masa;
La capacidad calorífica viene dada por la fórmula;
 
 
Dónde; 
Q representa la capacidad calorífica o la cantidad de calor. 
m representa la masa de un objeto. 
c representa la capacidad calorífica específica del agua. 
dt representa el cambio de temperatura.
dt = T2 - T1
dt = 120 - 30
dt = 90°C to kelvin = 273 + 90 = 363K
Sustituyendo en la fórmula, tenemos;
 
 
 
 
 
 
Masa, m = 0.088 kg