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- Question
Mirage is due to
Options- A. Magnetic disturbances in the atmosphere
- B. Equal heating of different parts of the atmosphere
- C. Unequal heating of different parts of the atmosphere
- D. Depletion of ozone layer in the atmosphere
- Correct Answer
- Unequal heating of different parts of the atmosphere
- 1. Which compound is a nonelectrolyte?
Options- A. C2H6O
- B. HCl
- C. Na2CO3
- D. NaCl Discuss
- 2. Compressions and Rarefactions are characteristic of
Options- A. Longitudinal waves
- B. Transverse waves
- C. Both A & B
- D. Neither of A & B Discuss
- 3. Which part of the flame is the hottest?
Options- A. Blue Zone
- B. Luminous Zone
- C. Dark Zone
- D. Non - Luminous Zone Discuss
- 4. The ability to do work is called Energy.
Options- A. TRUE
- B. FALSE Discuss
- 5. A bimetal made copper and iron strips welded together is straight at room temperature. It is held vertically with iron strip towards left and copper strip towards right. If this bimetal is heated , it will
Options- A. remain straight
- B. bend towards right
- C. bend towards left
- D. none of these Discuss
- 6. What measures Air pressure?
Options- A. Barkometer
- B. Bolometer
- C. Spectrometer
- D. Barometer Discuss
- 7. Wind and solar energy are examples of
Options- A. Non renewable
- B. Renewable
- C. Unsustainable
- D. Limited Discuss
- 8. Unresolved dissonance is a characteristic of Discuss
- 9. In which layer is the pressure the highest?
Options- A. Ionosphere
- B. Stratosphere
- C. Troposphere
- D. Inner core Discuss
- 10. The modulus of elasticity for mild steel is approximately equal to
Options- A. 210 kN/mm2
- B. 100 kN/mm2
- C. 80 kN/mm2
- D. 10 kN/mm2 Discuss
Physics problems
Search Results
Correct Answer: C2H6O
Explanation:
is a Non-electrolyte.
An electrolyte is a compound that conducts an electric current when it is in an aqueous solution or melted. In order to conduct a current, a substance must contain mobile ions that can move from one electrode to the other. All ionic compounds are electrolytes. When ionic compounds dissolve, they break apart into ions which are then able to conduct a current ( conductivity ). Even insoluble ionic compounds such as CaCO 3 are electrolytes because they can conduct a current in the molten (melted) state.
A nonelectrolyte is a compound that does not conduct an electric current in either aqueous solution or in the molten state. Many molecular compounds, such as sugar or ethanol, are nonelectrolytes. When these compounds dissolve in water, they do not produce ions.
Electrolytes are of 3 types ---- Strong Electrolytes, Weak Electrolytes and Non Electrolytes.
Strong Electrolytes ---- Compounds which completely dissolves. ( NaCl, Na2Co3, HCl )
Weak Electrolytes ----- Compounds which do not completely dissolves.
Non Electrolytes ------ Compounds which do not dissolves at all.
Correct Answer: Longitudinal waves
Explanation:
Compressions and Rarefactions are characteristic of Longitudinal waves.
The direction of vibration of the particles is in the same plane as in which the wave is propagating. The particles vibrate back and forth, about their mean positions.
Correct Answer: Blue Zone
Explanation:
Blue Zone is the hottest part of the flame that is where the flame has the most Oxygen and you are getting complete combustion. It is about 1400 degrees Centigrades. The Reddish part (Non - Luminous Zone) is the coolest part, about 800 deg C.
Correct Answer: TRUE
Explanation:
Yes, the ability to do work is called Energy is True.
Correct Answer: bend towards left
Correct Answer: Barometer
Explanation:
Air Pressure can be defined as the pressure of air in the earth's atmosphere. It reaches a maximum of about 100,000 Pa near sea level and decreases as altitude increases.
The barometer is an instrument which is used for measuring Air pressure.
Physics instruments and their uses:
Barkometer - - - Tanning liquors used in tanning leather
Bolometer - - - Electromagnetic radiation
Spectrometer - - - Properties of light.
Correct Answer: Renewable
Explanation:
Many types of renewable energy resources such as wind and solar energy are constantly replenished and will never run out.
Correct Answer: When the tension is unresolved, we have unresolved dissonance Unresolved dissonance is a characteristic of the baroque music The general characteristics of Baroque music is movement, energy, and tension
Correct Answer: Inner core
Explanation:
"Pressure" is the ratio of mass to area. So, for any given area, the one with more mass pressing on it will experience a higher pressure.
As you go more deeply into the atmosphere OR earth itself, you are putting more and more mass over you. For the same unit area therefore, the pressure, (mass/area) increases.
Hence, the lowest layer will always have the highest pressure i.e, inner core.
Correct Answer: 210 kN/mm2
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