1.00 kg of solid Hg at its melting point of -39∘C is placed in a 0.620-kg aluminum calorimeter with 0.400 kg of water at 12.80 ∘C; the resulting equilibrium temperature is 5.06 ∘C. The specific heat of aluminium is 900 J/kg⋅C∘, specific heat of water is 4186 J/kg⋅C∘, specific heat of mercury is 138 J/kg⋅C∘. Determine the latent heat of fusion of mercury using the given data?

Janelle made a hypothesis bout the uneven temperatures inside her house during winter. she believes that 50% of the ducts are blocked and she plans to investigate. if she wants to prove her hypothesis using scientific processes what should she do next?

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=