' B ' .
"Sound" is all vibrations in the medium. Whether it happens to be water,
air, steel, whatever is vibrating, the sound is the result of the vibrations.
When the vibrating stops, the sound stops.
Option A. A force does work on an object if a component of the force is is parallel to the displacement of the object.
<h3>Work done by force</h3>
The force applied to an object to displace it from a given point to another point is known as work done on the object.
W = Fd cosθ
where;
- f is the magnitude of applied force
- d is the displacement of the object.
- θ is the angle between the applied force and displacement.
Thus, A force does work on an object if a component of the force is is parallel to the displacement of the object.
Learn more about work done here:brainly.com/question/8119756
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The correct answer is
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C) 1200 g/m3. Let's see why. The relationship between liters and cube decimeters is
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Therefore,
However, we also know that
Therefore,
and
Therefore, the density of the problem
becomes
Answer:
The net force is 20N in the direction of the 80N force.
Explanation:
The net force is the resultant force acting on a body. This force is that singular force that will have the same magnitude and effect as the network of forces on a body.
In this problem:
Force 1 = 80N
Force 2 = 60N
Net force = Force 1 - Force 2
Net force = 80N - 60N
Net force = 20N
The net force is 20N in the direction of the 80N force.