Even tho one is stronger then the other... they are both alike because they are still nuclear forces.
It takes 392 joules of work to lift it.
It has 392 joules of gravitational potential energy up there.
Answer:
10mm
Explanation:
According to Hooke's law which states that "the extension of an elastic material is directly proportional to the applied force provided the elastic limit is not exceeded. Direct proportionality there means, increase/decrease in the force leads to increase/decrease in extension.
Mathematically, F = ke where;
F is the applied force
k is the elastic constant
e is the extension
from the formula k = F/e
k = F1/e1 = F2/e2
Given force of 1N indents the spring inwards by 2mm, this means force of 1N generates extension of 2mm
Let F1 = 1N e1 = 2mm
The extension that will be produced If force of 5N is applied to the string is what we are looking for. Therefore F2 = 5N; e2= ?
Substituting this values in the formula above we have
1/2=5/e2
Cross multiplying;
e2 = 10mm
This shows that we must have dent it by 10mm before it pushes outwards by a 5N force
Answer:
89 m
Explanation:
Applying
v = 2d/t................... Equation 1
Where v = velocity of sound in air, d = distance of the wall from Karen, t = time taken to hear the echo.
make d the subject of equation 1
d = vt/2..................... Equation 2
From the question,
Given: v = 343 m/s, t = 0.519 s
Substitute these values into equation 2
d = (343×0.519)/2
d = 89.01 m.
d ≈ 89 m
