Answer:
Diagram (3).
Explanation:
N3L states that if object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A (
).
Force = mass * acceleration
acceleration = change_in_velocity / time
so:
force = 740 kg * (19 m/s - 0 m/s) / 2.0 s
= 740 * 19 / 2 kg m per second^{2}
= 7030 kg m per second^{2}
= 7030 newtons of force
As per the question the volume of mercury is given as 0.002 m^3 at 20 degree Celsius.
We are asked to calculate the volume of the mercury at 50 degree Celsius.
This problem is based on thermal expansion of matter.
Let us consider the initial and final volume of the mercury is denoted as -

Let the initial and final temperature of the mercury is denoted as -

As per question


The change in temperature is



Mercury is a fluid.So we have to apply volume expansion of liquid .
The coefficient of of volume expansion of mercury
at 20 degree Celsius is 0.00018 per centigrade.
As per volume expansion of liquid,
![V_{T} = v_{1} [1 +\gamma [T_{2} -T_{1} ]]](https://tex.z-dn.net/?f=V_%7BT%7D%20%3D%20v_%7B1%7D%20%5B1%20%2B%5Cgamma%20%5BT_%7B2%7D%20-T_%7B1%7D%20%5D%5D)
Here
is the volume at T degree Celsius.
Hence volume at 50 degree Celsius is calculated as-
![v_{2} =v_{1} [1+\gamma[50-30]]](https://tex.z-dn.net/?f=v_%7B2%7D%20%3Dv_%7B1%7D%20%5B1%2B%5Cgamma%5B50-30%5D%5D)
![= 0.002[1+0.00018*30]](https://tex.z-dn.net/?f=%3D%200.002%5B1%2B0.00018%2A30%5D)
[ans]
As per the options given in the question ,option A is close to the calculated value. So option A is right.
A wedge is a machine and it is used for separating bodies.
<h3 /><h3>
The Wedge as a Machine</h3>
The wedge is a combination of two inclined planes. When the wedge is driven into a body by an effort force, a much larger force will be exerted to each side by the wedge surfaces.
What are the importance of wedge?
A wedge is used to separate bodies which are held together by large forces example of this scenario is splitting of timber. A wedge is a machine and the example of wedge - type of machine are;
Note that a thin wedge has a higher mechanical advantage than a short thick one.
Therefore, a wedge is a machine and it is used for separating bodies.
Learn more about machine here: brainly.com/question/2337612
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Answer:
An open circuit does not go on for an infinite time, but the closed circuit does.
Explanation: