Question

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Answer 1

Explanation:

mass=3kg

change in velocity= 3.5-2=1.5m/s

time =25

F= m(change in velocity/time)

= 3×1.5/25

= 0.18N

In the direction of moving block

Answer 2

idhi ee question dhi

Properties of covalent compounds:

• The covalent compounds have low melting and boiling points.
• covalent compounds may be solids, liquids or gases.
• These are soluble in Non- polar Solvents like Ccl4, Benzene etc.
• Covalent bond is a directional bond hence covalent compounds exhibit Isomerism.
• covalent compounds are non- conductors either in aqueous state (or) in molten state.

Hope it helps you keerthi