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matrenka [14]
3 years ago
9

La osteoporosis puede presentarse en la epoca de el embaraso y la lactancia

Engineering
1 answer:
MArishka [77]3 years ago
5 0

Answer:

En algunos casos, las mujeres desarrollan osteoporosis durante el embarazo o la lactancia, aunque esto es poco común. La osteoporosis es la pérdida ósea que es lo suficientemente grave como para provocar huesos frágiles y un mayor riesgo de fractura.

Explanation:

Espero que esto ayude a marcar el MÁS CEREBRAL !!!

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Annealing is a process by which steel is reheated and then cooled to make it less brittle. Consider the reheat stage for a 100-m
kodGreya [7K]

Complete question is;

Annealing is a process by which steel is reheated and then cooled to make it less brittle. Consider the reheat stage for a 100 mm thick plate (ρ = 7830 kg/m3, Cp = 550 J/kg K, k = 48 W/m K). The plate initially is at 200 °C and is to be heated to a minimum temperature of 550 °C. Heating is effected in a gas-fired furnace where the products of combustion at T∞ = 800 °C maintain a convection heat transfer coefficient of h = 250 W/m.K on both surfaces of the plate. How long should the plate be left in the furnace?

Answer:

860 seconds

Explanation:

We are given;

Initial Temperature; Ti = 200 °C

Minimum Temperature; T_i = 550 °C

T∞ = 800 °C

convection coefficient; h = 250 W/m².K

ρ = 7830 kg/m³

Cp = 550 J/kg K

k = 48 W/m K

Plate thickness = 100mm

Thus,L = 100/2 = 50mm = 0.05 m

Let's find the biot number from the formula;

Bi = hL/K

Bi = (250 × 0.05)/48

Bi = 0.2604

Now, lowest temperature in the slab is given as;

θ_o = (T_o - T∞)/(T_i - T∞)

θ_o = (550 - 800)/(200 - 800)

θ_o = 0.4167

Now, from online tables calculation, we can find the root of the biot number.

Thus, root of the biot number Bi = 0.2604 is;

ζ1 = 0.488 rad

Also, C1 is gotten as 1.0396

Now,formula for thermal diffusivity is;

α = k/ρc

α = 48/(7830 × 550)

α = 1.115 × 10^(-5) m²/s

Also, from online tables, f(ζ1) = 0.401

Thus, we can find the time the plate should the plate be left in the furnace from;

-(ζ1)²(αt/L²) = In 0.401

-(ζ1)²(αt/L²) = -0.9138

t = (-0.9138 × 0.05²)/-(0.488² × 1.115 × 10^(-5))

t ≈ 860 s

8 0
3 years ago
If, when a relay is energized, you measure 0.05 VAC across a set of normally open contacts, the A. relay is operating properly B
LiRa [457]

Answer: A

Explanation:

It means the relay is working properly.

3 0
3 years ago
Determine whether each of the following statements is true, false, or uncertain. Explain your answers. A decision maker seldom k
koban [17]

Answer:

a) FALSE: the opportunity cost of an activity is the total value of all of the alternatives passed up

b) FALSE: OC is a subjective measure of cost - only the individual can estimate the expected costs/benefits himself

c) FALSE: Info is only gathered if the expected benefits from gatherings info exceeds the costs of getting the expected costs - people normally make choices based on limited and incorrect info because of convenience

d) TRUE: you can guess you will enjoy a movie and then find it too violent for your tastes

Explanation:

Opportunity cost is commonly known as the alternative option to a particular activity. It is necessary to collect as many vital information as possible. It is important to collect information for business purpose and personal reasons. A movie can be interesting and at the same time, contains horror violent scenes.

6 0
3 years ago
Stephanie and her family went to the pumpkin patch to pick out the perfect pumpkin to carve for Halloween. Stephanie picked out
S_A_V [24]

Answer:

it is D).

Explanation:

because her pumpkin would fall out if it were A), if it were B) it would pull the wagon a little, and you would feel the stick get stuck in the axleif it was C). Thats why it is D).

8 0
3 years ago
What is control flow in programming?
MakcuM [25]

Answer:

The control flow is the order in which the computer executes statements in a script. Code is run in order from the first line in the file to the last line, unless the computer runs across the (extremely frequent) structures that change the control flow, such as conditionals and loops.

Explanation:

hope it helps.

brainliest pls

7 0
2 years ago
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