Answer:
b) 0.5 N
Explanation:
From coulomb's law,
F = kq'q/r².................... Equation 1
Where F =force of repulsion between the charges, q' = first charge, q = second charge, r = distance between the charges, k = proportionality constant.
q'q = Fr²/k........................... Equation 2
Given: F = 2 N, r = 1 m, k = 9.0×10⁹ Nm²/C²
Substituting into equation 2
q'q = 2(1)²/(9.0×10⁹)
q'q = 2/9.0×10⁹ C².
If the distance between the charges is increased to 2 meters,
r = 2 m, q'q = 2/9.0×10⁹ C².
Substitute into equation 1
F = 9.0×10⁹(2/9.0×10⁹)/2²
F = 2/4
F = 1/2 = 0.5 N.
The right option is b) 0.5 N
Answer:
no way to tell since the ocean surface is moving too violently it's not possible to determine the reflected angle
Answer:
Answer:
72.936 Joule
Explanation:
Mechanical Energy = Potential Energy + Kinetic Energy
Kinetic Energy = (1/2) x m x V² = (1/2) x 1.8 x 4.8² = 20.736 J
Potential Energy = m x g x h = 1.8 x 10 x 2.9 = 52.2 J
Total Mechanical Energy = 20.736 + 52.2 = 72.936 Joule
Explanation:
Superconductor, conductor, semiconductor, insulator
Answer:
B. Shear Modulus
Explanation:
In this scenario, the friction force between the sliding block and the floor causes the block to deform.
Hence, the elastic modulus which describes the relationship between stress and strain for a block of iron sliding across a horizontal floor is Shear Modulus.
Shear Modulus can be defined as the ratio of shear stress to shear strain with respect to a physical object.
This ultimately implies that, Shear Modulus arises as a result of the application of a shear force on an object or body which eventually leads to its deformation. Thus, this phenomenon is simply used by scientists to measure or determine the rigidity of an object or body.
Mathematically, Shear Modulus is given by the formula;

Where;
G is the Shear Modulus.
F is the force applied to the object.
A is the area of the object.
l is the length of the object.
Dx is the change in length.
Shear Modulus is measured in Pascals.