Answer:
unequal
Explanation:
White light is a combination of all colors in the color spectrum.
 
        
                    
             
        
        
        
Answer:
1.Gravity is an invisible force that pulls objects toward each other
2.The suns gravity pulls the planet towards the sun which changes the straight line of direction into a curve
That keeps the planet moving in an orbit around the sun
hope it helped:)
 
        
             
        
        
        
Answer:
16.2 days 
Explanation:
Find the number of halflives:
1/2   *  1/2 =  1/4     so <u>two</u>   halflives have passed 
    2 * 8.1 days = 16.2 days 
 
        
             
        
        
        
Answer:
The tensile stress on the wire is 550 MPa.
Explanation:
Given;
Radius of copper wire, R = 3.5 mm
extension of the copper wire, e =  5.0×10⁻³ L
L is the original length of the copper wire, 
Young's modulus for copper, Y =  11×10¹⁰Pa.
Young's modulus, Y is given as the ratio of tensile stress to tensile strain, measured in the same unit as Young's modulus.

Therefore, the tensile stress on the wire is 550 MPa.
 
        
             
        
        
        
Answer:
v = K √(E / ρ)
Explanation:
Modulus of elasticity has units of N/m², or kg/m/s².
Density has units of kg/m³.
Velocity has units of m/s.
If we divide modulus of elasticity by density, we can eliminate kg:
E / ρ = [kg/m/s²] / [kg/m³]
E / ρ = [m²/s²]
Taking the square root gets us units of velocity:
√(E / ρ) = [m/s]
Multiply by the constant K:
v = K √(E / ρ)