(This another set of questions from DT, i need the answers rn) (Q1) Volume and Mass of Beam.
The Density of Concrete is 2400 kg/m³.

i) Calculate the area of the end of the beam.
Area of end of Beam=

i) Calculate the volume of a single beam.
Volume of Beam =

i) What is the Mass of one beam? (Volume x Density)
Mass of beam =

(Q2) Sensible Heat.
The Specific Heat Capacity of concrete is 880 J/kg°C
Heat added = specific heat x mass x final/initial

i) How much heat energy (Joules) is needed to heat the beam from freezing point 0°C to maximum temperature of 40°C

ii) How much heat is lost as the beam cools to -5°C from temperature of 20°C overnight.

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

Ahouse has the following electrical appliance usage (1) single 40w lamp used for 4 hours per day (2) single 60w fan used for 12 hours per day (3) single 200w refrigerator that runs 24 hours per day with compressor run 12 hours and off 12 hours find the solar power inverter size in watt with correction factor of 1.25.

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line