4. How much heat must be released by mercury if you cool 13.6 g of the metal from a temperature of 23.0 degrees Celsius to -39.0 degrees Celsius,
freezing the mercury to a solid? (Specific heat of mercury is 0.14 J/gºC,
Latent heat of fusion for mercury is 11.44 J/9)
Please show work

In a vernier instrument the main scale is in 1/2 mm divisions .vernier is made by redividing 19 such divisions into 20 equal parts. calculate the least count of the instrument.

An airplane flies eastward and always accelerates at a constant rate. at one position along its path it has a velocity of 34.3 m/s, it then flies a further distance of 40100 m and afterwards its velocity is 47.5 m/s. find the airplane\'s acceleration and calculate how much time elapses while the airplane covers those 40100 m.

Which transition by an electron will release the greatest amount of energy? oa ob oc od