Answer:1) Via heat: ferromagnet materials will lose their magnetism if heated above a point known as the Curie temperature. ... With a strong enough magnetic field of opposite polarity, it is therefore possible to demagnetize the magnet [whether this comes from another permanent magnet, or a solenoid].
Explanation:Unlike permanent magnets, temporary magnets cannot remain magnetized on their own. Soft magnetic materials like iron and nickel will not attract paper clips after a strong external magnetic field has been removed.To restore a permanent magnet, you need to cool the metal (if heated) and expose it to a magnetic field. Coil your copper wire tightly around the piece of metal you would like to restore as a permanent magnet.
The person will feel cold.
Exothermic processes involve the loss of heat from the system, whereas endothermic processes bring heat into the system. Since heat is being lost from the system and heating up the test tube, reaction A is exothermic. The primary distinction between exothermic and endothermic reactions is that the former releases energy into the environment while the latter collects energy in the form of heat from its surroundings. Heat and light are significant indicators that a reaction has occurred when two chemicals are together. The reaction is exothermic if heat is released. Exothermic refers to a reaction in which molecules have transitioned from a higher to a lower energy state.
Learn more about endothermic reaction here :-
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Answer:
You did not add the photo, but the bright red stars are the largest in size (radius).
Explanation:
Red stars are giant, luminous stars. They are the stars with the largest size (radius) among all the other stars and usually have very low temperatures (below 500k). The brighter these stars appear to human eyes, the greater their actual size.
Red stars have rays hundreds of times larger than the sun, literally being the biggest stars in space. Despite their gigantic size, these stars have low density.
Answer:
Explanation:
We are given that
Gauge pressure at 3.4 degree Celsius,P=
We have to find the gauge pressure in tire when the temperature rises to 26 degree Celsius.
Atmospheric pressure=
K=273+Degree Celsius
Gauge pressure in tire when the temperature rises to 26 degree Celsius.=
If a substance absorbs energy but its temperature does not change, then the internal potential energy is changing.