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A mixture is made up of (a) two or more elements. (b) two or more compounds. (c) both (a) and (b). (d) none of these.
The correct answer is:(c) both (a) and (b) A mixture can be made up of two or more elements (e.g., a mixture of oxygen and nitrogen gases) or two or more compounds (e.g., a mixture of water and alcohol). It can also contain both elements and compounds together. https://www.tiwariacademy.com/ncert-soRead more
The correct answer is:(c) both (a) and (b)
A mixture can be made up of two or more elements (e.g., a mixture of oxygen and nitrogen gases) or two or more compounds (e.g., a mixture of water and alcohol). It can also contain both elements and compounds together.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/
See lessAccording to the kinetic theory of gases, the pressure exerted by a gas is due to:
According to the kinetic theory of gases, gas molecules are in constant random motion and exert pressure due to their collisions with the walls of the container. The pressure P is given by: P = (1/3) (N/V) m v̄² where: - N is the number of molecules, - V is the volume, - m is the mass of a molecule,Read more
According to the kinetic theory of gases, gas molecules are in constant random motion and exert pressure due to their collisions with the walls of the container. The pressure P is given by:
P = (1/3) (N/V) m v̄²
where:
– N is the number of molecules,
– V is the volume,
– m is the mass of a molecule,
– v̄² is the mean square velocity.
Every collision transfers momentum to the wall, and the result of many of these collisions is measurable gas pressure.
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Which of the following statements is not correct about the Himalayan rivers.
The correct answer is: (c) The Himalayan rivers have short courses from their source to the sea Explanation: Himalayan rivers have long courses, not short ones. They originate in the Himalayas and travel thousands of kilometers before reaching the sea. (a) Himalayan rivers are perennial – Correct beRead more
The correct answer is: (c) The Himalayan rivers have short courses from their source to the sea
Explanation:
Himalayan rivers have long courses, not short ones. They originate in the Himalayas and travel thousands of kilometers before reaching the sea.
(a) Himalayan rivers are perennial – Correct because they receive water from glaciers and rainfall, making them flow throughout the year.
(b) They have water throughout the year – Correct, as they are fed by melting snow and monsoon rains.
(d) They perform intensive erosional activity in their upper courses and carry huge loads of silt – Correct, because their steep gradients in the upper course cause strong erosion, leading to high sediment transport.
(c) The Himalayan rivers have short courses from their source to the sea – Incorrect, as rivers like the Ganga, Brahmaputra, and Indus have very long courses before reaching the sea.
Thus, the correct answer is:
(c) The Himalayan rivers have short courses from their source to the sea This question related to Chapter 3 Social Science Class 9th NCERT. From the Chapter 3 Drainage. Give answer according to your understanding.
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Which of the following river does not enter the Indus river near Mithankot in Pakistan?
The correct answer is: (d) The Yamuna Explanation: The Indus River in Pakistan is joined by several major tributaries near Mithankot, including: The Satluj The Beas The Ravi The Chenab The Jhelum These rivers are part of the Indus River System, flowing from India into Pakistan. However, the Yamuna RRead more
The correct answer is: (d) The Yamuna
Explanation: The Indus River in Pakistan is joined by several major tributaries near Mithankot, including:
The Satluj The Beas The Ravi The Chenab The Jhelum These rivers are part of the Indus River System, flowing from India into Pakistan. However, the Yamuna River does not enter the Indus River. Instead:
The Yamuna is a tributary of the Ganga River, flowing eastward and joining the Ganges (Ganga) in Prayagraj (Allahabad), India. This question related to Chapter 3 Social Science Class 9th NCERT. From the Chapter 3 Drainage. Give answer according to your understanding.
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The time period of a vibrating object is 0.005 s. The frequency of waves emitted by it is
(c) ∴ Time period T = 0.005 s ∴ Frequency v = 1/T = 1/0.005 = 200 Hz https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-11/
(c) ∴ Time period T = 0.005 s
∴ Frequency v = 1/T = 1/0.005 = 200 Hz
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-11/
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