Answer: a. People born when the Sun is in the constellation of Leo are more financially successful than other people.
Explanation:
Option A is the only claim that could be tested by scientific means. In this kind of a scientific study, we would need participants who were born when the Sun was in the constellation of Leo. We would then measure their financial success, in order to prove whether there is a particular correlation between the two. Other claims cannot be tested. For instance, we can never know what the final thoughts of Abraham Lincoln were, nor can we know whether God exists - some people chose to believe that he does and other that he does not. The question of whether blue is the best wall color depends on our personal preferences, and there is no universal answer.
Picking up a box, pushing a box along the ground, and pulling a box along the ground (B, C, and D) definitely involve work being done.
If a person CARRIES a box from one place to another, AND keeps it at the same height during the entire carry, then no work is done. ( A )
The law applied here is Hooke's Law which describes the force exerted by the spring with a given distance. The equation for this is F = kΔx, where F is the force in Newtons, k is the spring constant in N/m while Δx is the displacement in meters.
If you want to find work done by a spring, this can be solved by using differential equations. However, derived equations are already ready for use. The equation is
W = k[{x₂-x₁)² - (x₁-xn)²],
where
xn is the natural length
x₁ is the stretched length
x₂ is also the stretched length when stretched even further than x₁
In this case xn =x₁. So, that means that (x₁-xn) = 0 and (x₂-x₁) = 11 cm or 0.11 m.
Then, substituting the values,
2 J = k (0.11² -0²)
k = 165.29 N/m
Finally, we use the value of k to the Hooke's Law to determine the Force.
F = kΔx = (165.29 N/m)(0.11 m)
F = 18.18 Newtons
Energy of a random atomic and molecular is called molecules energy