The IRB at the university will decide whether her study meets ethical guidelines before it is initiated. The importance of these codes of conduct is to safeguard research participants, the status of psychology and the researchers or psychologists themselves. Moral issues hardly yield a simple, unequivocal, right or wrong answer. It is consequently often a matter of judgment whether the research is justified or not. For instance, it might be that a study roots psychological or physical uneasiness to participants, maybe they agonize pain or maybe even come to solemn harm.
Area because CM^2 is the unit used for Area
The first shell has 2 in and the second shell has 8 in therefore ypuvwont need to add anymore :-) so the answer is 0
Answer:
8.04 second
Explanation:
torque = 500 Nm
Length of blade, L = 2.4 m
mass of blade, m 40 kg
initial angular velocity, ωo = 0 rad/s
frequency, f = 2000 rpm = 2000 / 60 rps
final angular velocity, ωf = 2 x π x 2000 / 60 = 209.33 rad/s
Moment of inertia of the blade,
I = 19.2 kg m^2
Torque = Moment of inertia x angular acceleration
500 = 19.2 x α
where, α be the angular acceleration
α = 26.04 rad/s^2
Use first equation of motion
ω = ωo + αt
where t is the time taken by the propeller to reach 2000 rpm.
209.33 = 0 + 26.04 x t
t = 8.04 second
Thus, the time taken by the propeller is 8.04 second.