8. epiglottis
9. trachea
10. lugs
11.diaphragm
The amount of heat needed is 338 J
Explanation:
When a substance is at its melting point, the amount of heat required in order to completely melt the substance is given by the equation:
where:
m is the mass of the substance
is the specific latent heat of fusion of the substance
In this problem, we have:
m = 5.24 g is the mass of gold
is the specific latent heat of gold
The sample of gold is already at its melting point, , therefore the amount of heat needed to melt it is:
Learn more about specific heat:
brainly.com/question/3032746
brainly.com/question/4759369
#LearnwithBrainly
Answer:
Explanation:
<em>Work </em>is the change in kinetic energy and may be calculated as the product of the force in the direction of the displacement times the displacement.
For a differential displacement, Δx, and a variable force, f(x), the differential work done is:
And the total work done from a point xi to xf is:
Thus, for this problem we have:
- f(x) =
The symbol is just indicating that the direction of the force is in the same direction of the displacement.
Integrating you get:
And that is 54.8697 joules (since the units for x are meter and the units for f(x) are newtons).
Rounded to two significant digits: 55 joules.
Acceleration because it has a direction and magnitude