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Vanyuwa [196]
3 years ago
9

Express the unsteady angular momentum equation in vector form for a control volume that has a constant moment of inertia I, no e

xternal moments applied, one outgoing uniform flow stream of velocity V → , and mass flow rate m . .
Engineering
1 answer:
aliya0001 [1]3 years ago
3 0

Answer:

Explanation:

  • Recall that the angular momentum equation is given as I∝ = r x F
  • Taking note that the moment of inertia as constant.
  • The velocity of uniform flow is V →
  • The mass flow is m
  • Hence, the angular momentum equation in the control volume is given as I∝ = r x mF
  • where ∝ is the angular acceleration, r is the position vector from the axis of rotation to any point on the line of action of force.
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Realiza las siguientes conversiones.
amid [387]

Answer:

a) 4 hectómetros cuadrados equivalen a 400 decámetros cuadrados.

b) 21345 centímetros cuadrados equivalen a 2,135 metros cuadrados.

c) 0,592 kilómetros cuadrados equivalen a 592000 metros cuadrados.

d) 0,102 metros cuadrados equivalen a 1020 centímetros cuadrados.  

e) 23911 kilómetros cuadrados equivalen 2391100 hectómetros cuadrados.

Explanation:

a) <em>4 hectómetros cuadrados a decámetros cuadrados:</em>

Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un hectómetro cuadrado equivale a 100 decámetros cuadradps. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:

x = 4\,Hm^{2}\times\frac{100\,Dm^{2}}{1\,Hm^{2}}

x = 400\,Dm^{2}

4 hectómetros cuadrados equivalen a 400 decámetros cuadrados.

b) <em>21345 centímetros cuadrados a metros cuadrados:</em>

Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un metro cuadrado equivale a 10000 centímetros cuadrados. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:

x = 21345\,cm^{2}\times \frac{1\,m^{2}}{10000\,cm^{2}}

x = 2,135\,m^{2}

21345 centímetros cuadrados equivalen a 2,135 metros cuadrados.

c) <em>0,592 kilómetros cuadrados a metros cuadrados:</em>

Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un kilómetro cuadrado equivale a 1000000 metros cuadrados. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:

x = 0,592\,km^{2}\times \frac{1000000\,m^{2}}{1\,km^{2}}

x = 592000\,m^{2}

0,592 kilómetros cuadrados equivalen a 592000 metros cuadrados.

d) <em>0,102 metros cuadrados a centímetros cuadrados:</em>

Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un metro cuadrado equivale a 10000 centímetros cuadrados. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:

x = 0,102\,m^{2}\times \frac{10000\,cm^{2}}{1\,m^{2}}

x = 1020\,cm^{2}

0,102 metros cuadrados equivalen a 1020 centímetros cuadrados.

e) <em>23911 kilómetros cuadrados a hectómetros cuadrados:</em>

Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un kilómetro cuadrado equivale a 100 hectómetros cuadrados. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:

x = 23911\,km^{2}\times \frac{100\,Hm^{2}}{1\,km^{2}}

x = 2391100\,Hm^{2}

23911 kilómetros cuadrados equivalen 2391100 hectómetros cuadrados.

7 0
4 years ago
17- The cathodic polarization is ..... *
motikmotik
I think its c the both one
5 0
3 years ago
Suppose an underground storage tank has been leaking for many years, contaminating a groundwater and causing a contaminant conce
Ghella [55]

Answer: the cancer risk for an adult male drinking the water for 10 years is 2.88 × 10⁻⁶

Explanation:

firstly, we find the time t required to travel for the contaminant to the well;

Given that, contamination flowing rate = 0.5 ft/day

Distance of well from the site = 1 mile =  5280 ft

so t = 5280 / 0.5 = 10560 days

k is given as 1.94 x 10⁻⁴ 1/day

next we find the Pollutant concentration Ct in the well

Ct = C₀ × e^-( 1.94 x 10⁻⁴ × 10560)

Ct = 0.3 x e^-(kt)  

Ct= 0.0386 mg/L

next we determine the chronic daily intake, CDI

CDI =  (C x CR x EF x ED) / (BW x AT)

where C is average concentration of the contaminant(0.0368mg/L), CR is contact rate (2L/day), EF is exposure frequency (350days/Year), ED is exposure duration (10 years), BW is average body weight (70kg).

now we substitute  

CDI = (0.0368 x 2 x 350 x 10) / ((70x 365) x 70)

= 257.7 / 1788500

= 0.000144 mg/Kg.day

CDI = 1.44 x 10⁻⁴ mg/kg.day  

Finally we calculate the cancer risk, R

Slope factor SF is given as 0.02 Kg.day/mg

Risk, R = I x SF

= 1.44 x 10⁻⁴ mg/kg.day  x 0.02Kg.day/mg    

R = 2.88 × 10⁻⁶

therefore the cancer risk for an adult male drinking the water for 10 years is 2.88 × 10⁻⁶

7 0
4 years ago
15- Vipsana's Gyros House sells gyros. The cost of ingredients (pita, meat, spices, etc.) to make a gyro is $2.00. Vipsana pays
sineoko [7]
D is a great answer
4 0
3 years ago
How many gallons of water is needed to fill a pool.
zalisa [80]

Answer:

depends on the size

Explanation:

Length x width x depth x 7.5 = volume (in gallons)

Length times width gives the surface area of the pool. Multiplying that by the depth gives the volume in cubic feet. Since there are 7.5 gallons in each cubic foot, multiply the cubic feet of the pool by 7.5 to arrive at the volume of the pool, expressed in gallons.

6 0
3 years ago
Read 2 more answers
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