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Meenu Waien 3 days, 16 hours ago

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Yogita Ingle 2 weeks, 6 days ago

Rutherford’s conducted an experiment by bombarding a thin sheet of gold with α-particles and then studied the trajectory of these particles after their interaction with the gold foil.
Rutherford, in his experiment, directed high energy streams of α-particles from a radioactive source at a thin sheet (100 nm thickness) of gold. In order to study the deflection caused to the α-particles, he placed a fluorescent zinc sulphide screen around the thin gold foil. Rutherford made certain observations that contradicted Thomson’s atomic model.

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Yogita Ingle 1 month ago



  • It is the process of intake of air into the lungs.
  • It is the process of releasing air out from the lungs.
  • Diaphragm contracts and flattens by moving down.
  • Diaphragm relaxes and turns dome-shaped by moving up.
  • Internal intercostal muscles relax and external costal muscles contract.
  • Internal intercostal muscles contract and external intercostal muscles relax.
  • The volume of the lungs increases.
  • The volume of the lungs decreases.
  • Size of chest cavity increases.
  • Size of chest cavity decreases.
  • In this process, oxygen is taken into the blood.
  • In this process, carbon dioxide is pushed out.

Anil Harshit 1 month ago

The taking in off air air rich in oxygen into to the body is called in elation between and given out of a rich in in carbon dioxide known as a solution
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Bhoi Alka 1 month, 1 week ago

4rt English-1 Ans
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