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2 years ago

The force of impact is

1 answer:

3 0

In mechanics, an impact is a high force or shock applied over a short time period when two or more bodies collide. Such a force or acceleration usually has a greater effect than a lower force applied over a proportionally longer period.

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A manometer connected to a Pitot-static tube has a difference in the height of the two columns of water of 10 cm when the Pitot-

kaheart [24]

Answer:

v = 40 m/s

Explanation:

Difference in the height of the two columns:

$h_m = \triangle h = 10 cm \\h_m = 0.1 m$

Air density, $\rho_{air} = 1.225 kg/m^3$

Water density, $\rho_{w} = 1000 kg/m^3$

The velocity of air flow is given by the equation:

$v = \sqrt{2gh_m (\frac{p_w}{p_{air}} - 1) } \\\\v = \sqrt{2*9.81*0.1 (\frac{1000}{1.225} - 1) }\\\\v = 40 m/s$

7 0

4 years ago

A structural element for a new bridge is designed for a constant load of 1000 psi. Its mean resistance is 1200 psi and the proba

andrew11 [14]

Answer:

i) SF = 0.83

ii) 10 psi

iii) 3.16 psi

iv) 0.0083

Explanation:

Constant load = 1000 Psi

mean resistance = 1200 psi

Probability of failure = 1.9 * 10^-3

Determine

i) Safety factor

S.F = 1 / (mean load / load design ) = 1 / ( 1200 / 1000 ) = 0.83

ii) Standard deviation

1.9 X 10^-3 = e ( -1/2 ( μ / б) ^3 / (2.5 * 6 )

0.004756 = e^- 20000 / б^3

hence std = 10 psi

iii) Variance

= $\sqrt{10}$ = 3.16 psi

iv) coefficient of variation

Cv = std / mean resistance

= 10 / 1200 = 0.0083

4 0

3 years ago

Estimate the theoretical fracture strength of a brittle material if it is known that fracture occurs by the propagation of an el

Allisa [31]

Answer:

theoretical fracture strength = 16919.98 MPa

Explanation:

given data

Length (L) = 0.28 mm = 0.28 × 10⁻³ m

radius of curvature (r) = 0.002 mm = 0.002 × 10⁻³ m

Stress (s₀) = 1430 MPa = 1430 × 10⁶ Pa

solution

we get here theoretical fracture strength s that is express as

theoretical fracture strength = $s_{0} \times \sqrt{\frac{L}{r} }$ .............................1

put here value and we get

theoretical fracture strength = $1430 \times 10^6\times \sqrt{\frac{0.28\times 10^{-3}}{0.002\times 10^{-3}} }$

theoretical fracture strength = $16919.98 \times 10^6$

theoretical fracture strength = 16919.98 MPa

3 0

3 years ago

An air conditioning performance check requires the use of a

Lostsunrise [7]

Answer:

Explanation:

air conditioning performance check requires the use of aA.

Hope this helps!

4 0

3 years ago

Suggest how the following requirements might be rewritten in a

Alchen [17]

Answer:

answer letter c

Explanation:

yun anserr hhehehe

7 0

3 years ago