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4 years ago

Which one of the following statements about the Wright brothers is not true?

Engineering

1 answer:

11111nata11111 [884]4 years ago

3 0

On December 17, 1903, the Flyer flew for two minutes and 1200 feet.

Answer: Option B.

<u>Explanation:</u>

The first successful flight that was taken by the "Wright brothers" on seventeenth of December in the year 1903 was not for two minutes and more over there were four different flights that the brothers took on that same day.

The first one was for 12 seconds for 540 feet, the second flight was for thirteen seconds ans went up to 200 feet and the third flight was for fifteen seconds again for 200 feet. The fourth was the longest flight which lasted for 59 seconds.

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Composite beam transformations treat the composite beam as ________________:

dimaraw [331]

Answer:

Steel concrete composite beams consists of a steel beam over which a reinforced concrete slab is cast with shear connectors. In conventional composite construction, concrete slabs are simply rested over steel beams and supported by them. These two components act independently under the action of loads, because there are no connection between the concrete slabs and steel beam.

Hope this helps :) -Mark Brainiest Please :)

4 0

3 years ago

Electric Resistance Heating. A house that is losing heat at a rate of 50,000 kJ/h when the outside temperature drops to 4 0C is

ryzh [129]

Answer:

a) $\dot W = 0.978\,kW$ , b) $I = \left(50000\,\frac{kJ}{h} \right)\cdot \left(\frac{1}{3600}\,\frac{h}{s}\right)\cdot \left(\frac{1}{COP_{real}} \right) - 0.978\,kW$

Explanation:

a) The ideal Coefficient of Performance for the heat pump is:

$COP_{HP} = \frac{T_{H}}{T_{H}-T_{L}}$

$COP_{HP} = \frac{298.15\,K}{298.15\,K - 277.15\,K}$

$COP_{HP} = 14.198$

The reversible work input is:

$\dot W = \frac{\dot Q_{H}}{COP_{HP}}$

$\dot W = \left(\frac{50000\,\frac{kJ}{h} }{14.198} \right)\cdot \left(\frac{1}{3600}\,\frac{h}{s} \right)$

$\dot W = 0.978\,kW$

b) The irreversibility is given by the difference between real work and ideal work inputs:

$I = \dot W_{real} - \dot W_{ideal}$

$I = \left(50000\,\frac{kJ}{h} \right)\cdot \left(\frac{1}{3600}\,\frac{h}{s}\right)\cdot \left(\frac{1}{COP_{real}} \right) - 0.978\,kW$

7 0

4 years ago

Select the four parts of the plasma system that

Mandarinka [93]

Answer:

Power

pressure

cup

Temperature

Explanation:

6 0

3 years ago

A large plate is fabricated from a steel alloy that has a plane strain fracture toughness of 75 MPa (68.25 ksi). If the plate is

wariber [46]

Answer:

Explanation:

From the given information:

Strain fracture toughness $K_k$ = 75 MPa $\sqrt{m}$

Tensile stress $\sigma$ = 361 MPa

Value of Y = 1.03

Thus, the minimum length of the critical interior surface crack which will result to fracture can be determined by using the formula:

$a_c = \dfrac{1}{\pi} ( \dfrac{k_k}{\sigma Y})^2 \\ \\ a_c = \dfrac{1}{\pi} \Big [ \dfrac{75 \times \sqrt{10^3}}{361 \times 1.03 } \Big]^2 \\ \\ a_c = \dfrac{1}{\pi} \Big [ 6.378474693\Big]^2 \\ \\ \mathbf{ a_c = 12.95 \ mm}$

7 0

3 years ago

What ratio between differential gain and common-mode gain is called

dlinn [17]

Answer:

CMRR(Common Mode Rejection Ratio) is the ratio of differential gain and the common mode gain.

Explanation:

8 0

3 years ago