Answer:
much faster than average
Explanation:
did it on edge (2022-2032)
The power that must be supplied to the motor is 136 hp
<u>Explanation:</u>
Given-
weight of the elevator, m = 1000 lb
Force on the table, F = 500 lb
Distance, s = 27 ft
Efficiency, ε = 0.65
Power = ?
According to the equation of motion:
F = ma
![3(500) - 1000 = \frac{1000}{32.2} * a](https://tex.z-dn.net/?f=3%28500%29%20-%201000%20%3D%20%5Cfrac%7B1000%7D%7B32.2%7D%20%2A%20a)
a = 16.1 ft/s²
We know,
![v^2 - u^2 = 2a (S - So)\\\\v^2 - (0)^2 = 2 * 16.1 (27-0)\\\\v = 29.48m/s](https://tex.z-dn.net/?f=v%5E2%20-%20u%5E2%20%3D%202a%20%28S%20-%20So%29%5C%5C%5C%5Cv%5E2%20-%20%280%29%5E2%20%3D%202%20%2A%2016.1%20%2827-0%29%5C%5C%5C%5Cv%20%3D%2029.48m%2Fs)
To calculate the output power:
Pout = F. v
Pout = 3 (500) * 29.48
Pout = 44220 lb.ft/s
As efficiency is given and output power is known, we can calculate the input power.
ε = Pout / Pin
0.65 = 44220 / Pin
Pin = 68030.8 lb.ft/s
Pin = 68030.8 / 500 hp
= 136 hp
Therefore, the power that must be supplied to the motor is 136 hp
The reason you dream about him is because you continuously think about him, maybe even before falling asleep.
Answer:
True
Explanation:
To summarise, waves carry energy. The amount of energy they carry is related to their frequency and their amplitude. The higher the frequency, the more energy, and the higher the amplitude, the more energy.
Answer:
5.328Ibm/hr
Explanation:
Through laboratory tests, thermodynamic tables were developed, these allow to know all the thermodynamic properties of a substance (entropy, enthalpy, pressure, specific volume, internal energy etc ..)
through prior knowledge of two other properties such as pressure and temperature.
for this case we can define the following equation for mass flow using the first law of thermodynamics
![m=\frac{Q}{h1-h2}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7BQ%7D%7Bh1-h2%7D)
where
Q=capacity of the radiator =5000btu/hr
m = mass flow
then using thermodynamic tables we found entalpy in state 1 and 2
h1(x=0.97, p=16psia)=1123btu/lbm
h2(x=0, p=16psia)=184.5btu/lbm
solving
![Q=\frac{5000}{1123-184.5} =5.328Ibm/hr](https://tex.z-dn.net/?f=Q%3D%5Cfrac%7B5000%7D%7B1123-184.5%7D%20%3D5.328Ibm%2Fhr)