Answer:
1) A time-varying magnetic field will produce an electric field.
4) A time-varying electric field will produce a magnetic field.
Explanation:
1) A time-varying magnetic field will produce an electric field.
TRUE
time varying magnetic field will produce electric field which is given as
2) Time-varying electric and magnetic fields can propagate through space only if there is no matter in their path.
FALSE
Time varying electric field and magnetic field will induce each other and it can travel through any medium as well as it can travel without any medium also
3) Electric and magnetic fields can be treated independently only if they vary in time.
FALSE
electric field can be due to stationary charge and magnetic field due to current carrying elements so it is not compulsory to have time varying
4) A time-varying electric field will produce a magnetic field.
TRUE
Time varying electric field will produce magnetic field given as
Answer:
The answer is letter C, The energy of the supersaturated liquid is converted to heat as the compound crystallizes.
Explanation:
"Hand warmers" are very essential when the cold season comes. It provides warmth to the hands, especially when going outdoors. There are different kinds of hand warmers, such as the<em> "reusable hand warmer." </em>In contrast to air-activated hand warmers, the reusable hand warmers contain sodium acetate (not iron).
Sodium acetate is a "supersaturated liquid." This means that is has more substances dissolved in it. So, when this crystallizes, heat is released. Remember that crystallization is considered an "exothermic process." This means that the process releases energy (in this case, through "heat").
Thus, this explains the answer, letter C.
☯ <u>Answer</u>:
Volcano is a type of mountain or a hill which shaped conically contains of lava, volcanic dusty ash, hot air vapours, and different types of tonics gases which comes from earth's crust.
✪ <u>Major components of volcano</u> :
- Magma chamber
- Conduits
- Vents
- Craters
- Slopes
❈ <u>Types of volcanoes</u> :
- Ciner coned volcano
- Strato volcano
- Shield volcano
Answer:
Frequency,
Explanation:
Given that,
Energy of a gamma rays,
Since,
The energy of a wave is given by :
is the frequency of such a photon
So, the frequency of such a photon is . Hence, this is the required solution.