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2 years ago

The moisture content in air (humidity) is measured by weight and expressed in pounds or ____________________.

1 answer:

3 0

Moisture content is measured in terms of pounds of water per pound of air (lb water/lb air) or grains of water per pound of air (gr. of water/lb air).

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16 engineering design process

Nesterboy [21]

Answer:

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3 years ago

What is operant conditioning

Degger [83]

DescriptionOperant conditioning is a type of associative learning process through which the strength of a behavior is modified by reinforcement or punishment. It is also a procedure that is used to bring about such learning.

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4 years ago

Select three possible deliverables that might be specified in a project charter.

lianna [129]

In a balanced three-phase Y-Y system, the source is an abc sequence of voltages and Van 100 20° V rms. The line impedance per phase is 0.6 + j1.2 N, while the per-phase impedance of the load is 10 + j14 Q. Calculate the line currents and the load voltages.

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3 years ago

In dynamics, the friction force acting on a moving object is always a) in the same direction of its motion b) a kinetic friction

FrozenT [24]

Answer:

B) a kinetic friction

Explanation:

The force of friction in a movement object its called kinetic friction force (fk). The net force acting in the direction of the movement its express, according to the Newton second law, like this: F- fk. That expression says that the net force produces an aceleration in the direction of the movement of the object.

Now if the force its removed, the fk its continue acting in the object but now in the opposite direction. And according to the Newton second law this fk it going to continue acting until the object stay in a still state.

In conclusion, if an object moves in some direction the kinetic friction force always be opposite to that direction of movement, according to the Newton second law

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3 years ago

A beam of span L meters simply supported by the ends, carries a central load W. The beam section is shown in figure. If the maxi

saw5 [17]

Answer:

W = 11,416.6879 N

L ≈ 64.417 cm

Explanation:

The maximum shear stress, $\tau_{max}$ , is given by the following formula;

$\tau_{max} = \dfrac{W}{8 \cdot I_c \cdot t_w} \times \left (b\cdot h^2 - b\cdot h_w^2 + t_w \cdot h^2_w \right )$

$t_w$ = 1 cm = 0.01

h = 29 cm = 0.29 m

$h_w$ = 25 cm = 0.25 m

b = 15 cm = 0.15 m

$I_c$ = The centroidal moment of inertia

$I_c = \dfrac{1}{12} \cdot \left (b \cdot h^3 - b \cdot h_w^3 + t_w \cdot h_w^3 \right )$

$I_c$ = 1/12*(0.15*0.29^3 - 0.15*0.25^3 + 0.01*0.25^3) = 1.2257083 × 10⁻⁴ m⁴

Substituting the known values gives;

$I_c = \dfrac{1}{12} \cdot \left (0.15 \times 0.29^3 - 0.15 \times 0.25^3 + 0.01 \times 0.25^3 \right ) = 1.2257083\bar 3 \times 10^{-4}$

$I_c$ = 1.2257083 $\bar 3$ × 10⁻⁴ m⁴

From which we have;

$4,500,000 = \dfrac{W}{8 \times 1.225708\bar 3 \times 10 ^{-4}\times 0.01} \times \left (0.15 \times 0.29^2 - 0.15 \times 0.25^2 + 0.01 \times 0.25^2 \right )$