A copper wire LM is fused at the end M to an iron wire MN. The copper wire has length 0.9m and cross-sectional area
0.9 x 106m2. The iron wire has length 1.4m and cross-sectional area
1.3 x 106m². When the compound wire is stretched, its total length
increases by 0.01m. Calculate:
(i) the ratio of the extensions of the two wires,
(ii) the extension of each wire,
(iii) the tension applied to the compound wire
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Which property of fossils allow scientists to determine the relative rock ages..

The 5-kg cylinder is initially at rest when it is placed in contact with the wall b and the rotor at a. if the rotor always maintains a constant clockwise angular velocity v = 6 rad> s, determine the initial angular acceleration of the cylinder. the coefficient of kinetic friction at the contacting surfaces b and c is mk = 0.2.

Adiver named jacques observes a bubble of air rising from the bottom of a lake (where the absolute pressure is 3.50 atm) to the surface (where the pressure is 1.00 atm). the temperature at the bottom is 4.00 ∘c, and the temperature at the surface is 23.0 ∘c. what is the ratio of the volume of the bubble as it reaches the surface (vs) to its volume at the bottom (vb)? if jaques were to hold his breath the air in his lungs would be kept at a constant temperature. would it be safe for jacques to hold his breath while ascending from the bottom of the lake to the surface?