A shell bursts on contact with the ground and pieces from


1.A shell bursts on contact with the ground and pieces from it fly in all directions with velocities up to 49 metres per second. Show that a man 122.5 metres away is in danger for 5?2 second.

2.In coal mines, why fan is kept in a return airway and why the evasee shape is constructed? also, why it is bent at the end?

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Civil Engineering: A shell bursts on contact with the ground and pieces from
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