Answer:
DU = 375 Joules
Explanation:
Given the following data;
Quantity of heat = 500 Joules
Work done = 125 Joules
To find the change in internal energy;
Mathematically, the change in internal energy of a system is given by the formula;
DU = Q - W
Where;
- DU is the change in internal energy.
- Q is the quantity of energy.
- W is the work done.
Substituting into the formula, we have;
DU = 500 - 125
<em>DU = 375 Joules</em>
The question is incomplete. Here is the complete question.
A spring with a spring constant of 68 newtons per meter hangs from a ceiling. Whena 12-newton downward force is applied to the free end of the spring, the spring streches a total distance of
(1) 5.7m
(2) 0.59m
(3) 820m
(4) 0.18m
Answer: (4) 0.18 m
Explanation: The force necessary to compress or extend a spring by a displacement is directly proportional to that distance and the spring's constant. This relationship is stated by a principle called <u>Hooke's</u> <u>Law</u>:
![F=-k\Delta x](https://tex.z-dn.net/?f=F%3D-k%5CDelta%20x)
k is spring constant, which shows how stiff the spring is and so, is characteristic of each spring;
x is total displacement;
The negative sign on the formula indicates the restoring force caused by the spring is in opposite direction related to the force and it is why the displacement occurs.
So, for the spring in the question above:
![F=-k\Delta x](https://tex.z-dn.net/?f=F%3D-k%5CDelta%20x)
![\Delta x=\frac{F}{k}](https://tex.z-dn.net/?f=%5CDelta%20x%3D%5Cfrac%7BF%7D%7Bk%7D)
![\Delta x=\frac{12}{68}](https://tex.z-dn.net/?f=%5CDelta%20x%3D%5Cfrac%7B12%7D%7B68%7D)
![\Delta x = 0.18](https://tex.z-dn.net/?f=%5CDelta%20x%20%3D%200.18)
When a 12 N force is applied to the spring, it streches 0.18 m.
Equation of line is y=mx+c
substitute y and x into y=mx+c,
7=1+c
c=6
hence, y=x+6
Answer:
you absolute buffoon Use Ohms' Law: V = RI
V = (1x10^3)(5x10^-3) = 5 volts
Yes, this is in the range of normal household voltages.
Explanation:
The sector that emits the most greenhouse gas annually is the transportation.
<h3>What is greenhouse gas?</h3>
The gases mostly Carbon-di-oxide and methane absorb the heat energy from the Sun and this heat gets trapped in the closed space which results in the excess heating of the atmosphere.
Transportation totally forms 27% of 2020 greenhouse gas emissions. The transportation sector generates the largest amount of greenhouse gas emissions. Greenhouse gas emissions from transportation primarily come from the cars, trucks, ships, trains, and planes.
Thus, the sector that emits the most greenhouse gas annually is the transportation.
Learn more about green house gas.
brainly.com/question/15811403
#SPJ1