Answer:
heater wattage = 4.32 kW
Explanation:
given data
volume flow rate of air = 0.1 m³/s
temperature t1 = 15°C
temperature t2 = 50°C
relative humidity RH = 80%
pressure = 101.325 kPa
to find out
heater wattage
solution
we will get here h value from psychometric chart with the help of temperature
that is
h1 = 37 kJ/kg
and
h2 = 73 kJ/kg
and v1 = 0.829 m³/kg
so here heater wattage formula is
heater wattage = m ( h2 -h1) ......1
here m is
m = V/v1 = 0.1 / 0.819 = 0.12 kg/s
so from equation 1
heater wattage = 0.12 ( 75 -39 )
heater wattage = 4.32 kW
The rocket would be considered Gyrojet
Answer: Foundries
Explanation: Casting is the method of making the liquid material to be shaped into solid form by being poured in a mold and having a hollow cavity . The liquid then turns into a solid state and this is known as casting. the casting odd metal is usually carried out in different shapes by the help of furnaces ,gases, molds etc.This process is usually performed in the certain industries known as foundry.
Answer:
B) Attenuation
Explanation:
Attenuation can be regarded as the loss of signal strength which could be as a result of both external and internal factors. This loss of signal strength could occur in networking cables as well as other connections. Attenuation is a loss in energy, because as signal travels, its strength decreases as a a result of distance it covers, this loss of energy is due to the signal trying to overcome the resistance at the medium. One of the main the causes of attenuation is When there is Extra noise on available networks, networks such as electrical current as well as radio waves. It should be noted that attenuation is Signal loss which is the reduction of a signal that occurs in a medium as a function of the physical length of the channel.
Singnal attenuation can taken care of by using lower loss materials with high cost, instead of making of PCB routing length reduction. Amplifiers can also be engaged in amplifying attenuated signal to get back the original signal, this will compensate the loss.
Attenuation can be measured in decibels(dB), this gives the measurement of relative strengths of one signal at two different point or measurement of two signals.