Answer:
According to Lenz's law the magnet slows down.
Magnet drop without slowing down.
Explanation:
When the magnet is falling in the copper coil, then flux through the coil increases but according to Lenz's law in copper tube current will induce in that direction where the magnetic flux decreases. So, the magnet is repelled and slows down.
And when it is moving down after passing through a copper tube, then the flux decreases and the current will increases in reverse direction due to Lenz's law and will attract a magnet and again due to this it slows down.
If a long slit is cut along the copper then the induced current drops a lot and force also drop. So, the magnet passes through the coil in a shorter time or without slowing down.
Exactly the same
Explanation:
Objects looks exactly the same when viewed through a transparent object. A transparent body allows light to pass through completely. Therefore, the image formed will completely resemble that of the object to be viewed.
Examples are air, glass, pure water.
A translucent body partially allows light to pass through it. Most times, the image is not clear and it is distorted.
An opaque object will not allow light pass through it. It completely obstructs the ray of path of light. An opaque body will produce an image on the screen.
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<u>Answer</u>: oscillating universe theory
<u>Explanation</u>:
- The <em>oscillating universe theory</em> is a modification of the famous big bang theory.
- According to this theory, there are successive cycles of expansion and contraction that occurs in the universe and due to the contraction, the universe gets confined into a very small volume which has a large density.
- When the universe gets confined in such a way then, it is said that a 'bounce' will occur and,<em> it would thus oscillate between the big bang and the big crunch.</em>
- Thus, this theory states that for<em> every big bang there is a big crunch.</em>
The answer is:
Forces acting on the sled are paired with equal and opposite forces.
The explanation:
About to push you, this means that he doesn't push yet. If the sled is on level ground and no one is pushing it, then forces are equal and opposite.
The gravity force pulls down and the ground pushes up.
This is Newton's third law:
Newton's third law: If an 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.
This law represents a certain symmetry in nature: forces always occur in pairs, and one body cannot exert a force on another without experiencing a force itself.
We can also see Newton’s third law at work by taking a look at how people move about. Consider a swimmer pushing off from the side of a pool.