Answer:
The correct option is C. Uneven heating of the earth by the sun is the condition most responsible for causing wind.
Explanation:
Wind arises due to contrasting pressures at different parts of the earth. These separate atmospheric pressures are caused due to the uneven heat showered by the sun on the earth. Hence, this phenomenon will generate the movements of winds from an area of high pressure to an area of low pressure.
Other options such as Coriolis effect are incorrect because the Coriolis effect explains the deflections caused in the wind, it is not the actual reason why winds are caused.
Answer:
See explanation
Explanation:
Electrons transition between energy levels in an atom due to gain or loss of energy. An electron may gain energy and move from its ground state to one of the accessible excited states. The electron quickly returns to ground state, emitting the energy previously absorbed as a photon of light. The wavelength of light emitted is measured using powerful spectrometers.
Atoms can be excited thermally or by irradiation with light of appropriate frequency.
Answer:
Activating a glow stick is the example of a chemical change, as snapping one will cause a chemical reaction, causing the glow. All of the other options are physical changes because nothing new is formed. Hope this helps!
Answer:
If the hydrated salt is overheated, it causes the anhydrous salt to decompose, causing the product to be lost as gas. The reported percentage of water loss will be too high because the gap between the initial measurement and final (which will be lower due to loss of sample) measurement will widen.
Answer:
We can define density as per unit volume. The SI unit to measure the density of solid, liquid and gas is kilogram per cubic metre (kg/m3) and in the centimeter–gram–second system of units (cgs unit) is gram per cubic centimeter (g/cm3).
Explanation:
