Urgent question

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1. The length of a mercury thread in an uncalibrated thermometer is 2cm when immersed in pure melting ice, and 27cm when surrounded by steam from boiling water under normal atmospheric pressure. What is the length of the mercury thread when placed in a liquid of 60 degree celcius.

2. Two identical electric bulbs, marked 220V and 100W, are connected in series to a source of 220V. The power dissipation will be?

3. 238 is the mass no of U and 92 is the atomic no of U. U decays by emitting two α and two ϐ particles. What is the atomic no changes in the resulting nuclide?

4. Two objects A and B of mass 4 kg and 9kg respectively have the same momentum. They are then subjected to the same constant resisting force and gradually brought to rest. What is the ratio of stopping distance of A to that of B?