You have to wait a little bit until you can give the person brainiest. You mostly give it to someone who gave a great answer. :)
The first thing we are going to do is find the equation of motion:
ωf = ωi + αt
θ = ωi*t + 1/2αt^2
Where:
ωf = final angular velocity
ωi = initial angular velocity
α = Angular acceleration
θ = Revolutions.
t = time.
We have then:
ωf = (7200) * ((2 * pi) / 60) = 753.60 rad / s
ωi = 0
α = 190 rad / s2
Clearing t:
753.60 = 0 + 190*t
t = 753.60 / 190
t = 3.97 s
Then, replacing the time:
θ1 = 0 + (1/2) * (190) * (3.97) ^ 2
θ1 = 1494.51 rad
For (10-3.97) s:
θ2 = ωf * t
θ2 = (753.60 rad / s) * (10-3.97) s
θ2 = 4544,208 rad
Number of final revolutions:
θ1 + θ2 = (1494.51 rad + 4544.208 rad) * (180 / π)
θ1 + θ2 = 961.57 rev
Answer:
the disk has made 961.57 rev 10.0 s after it starts up
Answer: Robert H. Goddard
Explanation: he developed and flew the first liquid-propellant rocket
Answer:
A weak fuel to air mixture along with normal airflow through a turbine engine may result in <u>a lean die out</u>.
Explanation:
Lean die out is a type of problem that may occur in the turbine. This may result in the weak fuel to air mixture. In case if the mixture of fuel and air is getting low due to some reasons like leakage of gas or low speed of engine may result in dangerous conditions such as fire or blast in the turbine. This is called lean die out. In the result of this problem, the turbine can be burn with the blast and may leads to causalities.