How is the respiratory passage kept free of dust particles ?

What is the importance of dust particles in air?

which of the following structures of respiratory passage is devoid of incomplete cartilaginous rings?

Dust particles released by comets are continuously acted upon by sun's radiation pressure in radial outward direction. Assuming a dust particle with rho =3.5 xx10^3 kg//m^3 and reflection coefficient 0. for what value of radius r does gravitational force on dust. particle just balance the radiation force on it from sunlight ? (power radiated by sun =4xx10^(26) W , mass of sun =2xx10^(30)kg )

Assertion :- Trachea is lined by ciliated epithelium. Reason :- The co-ordinated movements of cilia in the trachea help in removing dust particles and some of the foreign substances inhaled alongwith atmospheric air.

Which of the following groups of viruses are known to infect the nose and respiratory passage in humans?

Study the given figure of respiratory passage carefully and identify the parts labelled as A, B, C, D and E.

The process by which ligher earthly particles are made free from heavier particles by washing with water is called

A concave mirror of radius 40 cm lies on a horizontla tale and wateis filled in it up t a heightof 5.00 cm. A small dust particle floats on the water surface at a point P vertically above tge pointof contact of the miror with the table. Locate the image of the dust particle as seen from a point directly above it. tEh refractie index of water is 1.33.

A concave mirror of radius 40 cm lies on a horizontal table and water is filled in it upto a height of 5.00 cm. A small dust particle floats on the water surface at a point P vertically above the point of contact of the mirror with the table. Locate the image of the dust particle as seen from a point directly above it. the refractive index of water is 1.33.

Three particles, each of mass 200 g are kept at the corners of an equilateral triangle of side 10 cm. Find the moment of inertia of the system about an axis a. joining two of the particles b. passing through one of the particle perpendicular to the plane of the particles.