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Explain the types of chromosomes.
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Give scientific reason.
The velocity of an object at rest is considered to be uniform.
Concept: undefined >> undefined
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Give scientific reason.
The velocity of an object at rest is considered to be uniform.
Concept: undefined >> undefined
Give scientific reasons.
The velocity of an object at rest is considered to be uniform.
Concept: undefined >> undefined
Give scientific reason:
The velocity of an object at rest is considered to be uniform.
Concept: undefined >> undefined
Give scientific reason.
The velocity of an object at rest is considered to be uniform.
Concept: undefined >> undefined
Give scientific reason.
The velocity of an object at rest is considered to be uniform.
Concept: undefined >> undefined
Give a scientific reason.
When an object falls freely to the ground, its acceleration is uniform.
Concept: undefined >> undefined
An object of mass 16 kg is moving with an acceleration of 3 m/s2. Calculate the applied force. If the same force is applied to an object of mass 24 kg, how much will be the acceleration?
Concept: undefined >> undefined
Explain the difference between potential energy and kinetic energy.
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Derive the formula for the kinetic energy of an object of mass m, moving with velocity v.
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If an object has 0 momentum, does it have kinetic energy? Explain your answer.
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Three resistances x1, x2, and x3 are connected in a circuit in different ways. x is the effective resistance. The properties observed for these different ways of connecting x1, x2 and x3 are given below. Write the way in which they are connected in each case. (I-current, V-potential difference, x-effective resistance)
- Current I flows through x1, x2 and x3
- x is larger than x1, x2 and x3
- x is smaller than x1, x2 and x3
- The potential difference across x1, x2 and x3 is the same
- x = x1 + x2 + x3
- x = `1/(1/X_1 + 1/X_2 + 1/X_3)`
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The resistance of a 1 m long nichrome wire is 6 ohm. If we reduce the length of the wire to 70 cm. what will its resistance be?
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When two resistors are connected in series, their effective resistance is 80 Ω. When they are connected in parallel, their effective resistance is 20 Ω. What are the values of the two resistances?
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Answer the following question in your own words.
Sketch, label and describe the Spirogyra.
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Match the proper terms from columns A and C with the description in column B.
| ‘A’ | ‘B’ | ‘C’ |
| Thallophyta | Seeds are formed in fruits. | Fern |
| Bryophyta | No natural covering on seeds. | Cycas |
| Pteridophyta | These plants mainly grow in water. | Tamarind |
| Gymnosperms | These plants need water for reproduction. | Moss |
| Angiosperms | Tissues are present for the conduction of water and food | Algae |
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Complete the sentence by filling in the blank and explaining the statement.
______ plants have soft and fibre-like body.
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Explain the difference.
Degradable and non-degradable waste
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State the scientific and eco-friendly methods of waste management.
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