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- Question
Is air homogeneous or heterogeneous?
Options- A. homogeneous
- B. heterogeneous
- C. Both A & B
- D. None of the above
- Correct Answer
- homogeneous
ExplanationA Mixture is a material made up of two or more different substances which are mixed.
Mixtures can be either homogeneous or heterogeneous.
* A homogeneous mixture is a type of mixture in which the composition is uniform and every part of the solution has the same properties.
* A heterogeneous mixture is a type of mixture in which the components can be seen, as there are two or more phases present.
Air is a homogeneous mixture of the gaseous substances nitrogen, oxygen, and smaller amounts of other substances.
- 1. 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
- 2. In which layer is the pressure the highest?
Options- A. Ionosphere
- B. Stratosphere
- C. Troposphere
- D. Inner core Discuss
- 3. Unresolved dissonance is a characteristic of Discuss
- 4. Wind and solar energy are examples of
Options- A. Non renewable
- B. Renewable
- C. Unsustainable
- D. Limited Discuss
- 5. What measures Air pressure?
Options- A. Barkometer
- B. Bolometer
- C. Spectrometer
- D. Barometer Discuss
- 6. Work done in a free expansion process is
Options- A. Minimun
- B. 0
- C. Maximum
- D. None of the above Discuss
- 7. Which of the following is a renewable source of energy
Options- A. Natural gas
- B. Coal
- C. Wind
- D. Oil Discuss
- 8. Is blood homogeneous or heterogeneous?
Options- A. Homogeneous
- B. Heterogeneous
- C. Both A & B
- D. None of the above Discuss
- 9. Which has the lowest albedo?
Options- A. dark surfaces
- B. light surfaces
- C. Both A & B
- D. None of the above Discuss
- 10. Megahertz is a measurement of
Options- A. Frequency
- B. Speed
- C. Wavelength
- D. Capacity Discuss
Physics problems
Search Results
Correct Answer: 210 kN/mm2
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: 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: Renewable
Explanation:
Many types of renewable energy resources such as wind and solar energy are constantly replenished and will never run out.
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: 0
Explanation:
No work done as there is no external external pressure in free expansion.
Hence, Work done in a free expansion process is Zero.
Correct Answer: Wind
Explanation:
The energy sources that are constantly being replenished, such as sunlight, wind, and water. This means that we can use them as much as we want, and we do not have to worry about them running out. Additionally, renewable energy sources are usually much more environmentally friendly than fossil fuels. Overall, they release very few chemicals, like carbon dioxide, that can harm the environment.
Most of this energy comes from fossil fuels, such as coal, oil, and natural gas. These are nonrenewable energy sources, which means that if we use them all up, we can never get more during our lifetime. Fossil fuels also contribute greatly to global climate change by releasing carbon dioxide into the air when they are burned.
Correct Answer: Heterogeneous
Explanation:
Blood is a heterogeneous mixture because the blood cells are physically separate from the blood plasma. The cells have different properties than the plasma. The cells can be separated from the plasma by centrifuging, which is a physical change.
Correct Answer: dark surfaces
Explanation:
Albedo refers to a material's ability to reflect sunlight. Since 30% of the sun's energy is reflected by the entire earth, the earth has an average albedo of 0.30.
Generally, dark surfaces have a low albedo and light surfaces have a high albedo.
Correct Answer: Frequency
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