In the following Isotopes, determine the number of
Protons, Neutrons and electrons .
(i) Atomic number 9, mass
number 18 and charge of -1
(ii)
(i) Atomic number 43, mass number 99 and charge +7.
(ii) Atomic number 53, mass number 131 and charge-1.
(iii)Atomic number 81, Atomic mass number 201 and
Charge +1​

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.

An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.