Question

41State the laws if refectin if light.

42. Write any twi pripertes if metals.

43. What are the twi hirmines released frim the ivaries? Give their functin.

44. Hiw di leguminius plants fix nitrigen?

45. Diferentate between a unicellular and multcellular irganism with an example each.

46. Define pitch. Explain the relatinship between pitch and frequency.​

Answer 1

Answer:

Laws of reflection are: (i) The incident ray, the reflected ray and the normal ray at the point of incidence, lie in the same plane. (ii) The angle of incidence is equal to the angle of reflection.

Properties of metals

high melting points.

good conductors of electricity.

good conductors of heat.

high density.

malleable.

ductile.