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zlopas [31]
3 years ago
7

What has been done to make structures more seismic safe?

Physics
2 answers:
BabaBlast [244]3 years ago
7 0
To make structure more seismic safe, the following are done:
1. the foundation is made deeper so it will anchor to the ground more, and will make the structure more stable during seismic activity.
2. concrete building frames are braces so that it will not shake during seismic activity
3. and the panels of the structures are also cross-braced
ryzh [129]3 years ago
5 0

In order to make structures more seismic safe there are various ways by which one can build earthquake resistance structures which are far better than conventional ones.

The pyramidal or triangular shape structures contain less number of sides.A structure containing less number of sides frames greater resistance shape.

A rigid structure is more crumble and is more prone to annihilation.So the structure should be flexible.If we compare a taller building with a shorter one,the tall structure is more flexible.The shorter builds can not withstand the force of earth quakes.

During the construction of buildings,one should introduce the foundational plates .The layered foundational plates help buildings or other structures from destruction as they allow the sliding movement of the earth quake.

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Suppose a small quantity of radon gas, which has a half-life of 3.8 days, is accidentally released into the air in a laboratory.
Daniel [21]

Answer:

1 day

Explanation:

Let the safe level = x

The current level = x + 0.2x = 1.2 x

Thus,

Half life = 3.8 days

t_{1/2}=\frac {ln\ 2}{k}

Where, k is rate constant

So,  

k=\frac {ln\ 2}{t_{1/2}}

k=\frac {ln\ 2}{3.8}\ days^{-1}

The rate constant, k = 0.1824 days⁻¹

Using integrated rate law for first order kinetics as:

[A_t]=[A_0]e^{-kt}

Where,  

[A_t] is the concentration at time t

[A_0] is the initial concentration

So,

\frac {[A_t]}{[A_0]} = x / 1.2 x = 0.8333

t = ?

\frac {[A_t]}{[A_0]}=e^{-k\times t}

0.8333=e^{-0.1824\times t}

t ≅ 1 day

<u>Lab must be vacated in 1 day.</u>

4 0
3 years ago
One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a s
baherus [9]

Given that,

Central maximum = 1 cm

Distance from the window shade to the wall =4 m

We know that,

The visible range of the sun light is 400 nm to 700 nm.

(a). We need to calculate the average wavelength

Using formula of average wavelength

\lambda_{avg}=\dfrac{\lambda_{1}+\lambda_{2}}{2}

Put the value into the formula

\lambda_{avg}=\dfrac{400+700}{2}

\lambda_{avg}=550\ nm

(b). We need to calculate the diameter of the pinhole

Using formula for diameter

w=\dfrac{2.44\lambda L}{D}

D=\dfrac{2.44\lambda L}{w}

Put the value into the formula

D=\dfrac{2.44\times550\times10^{-9}\times4}{1\times10^{-2}}

D=0.537\ mm

Hence, (a). The average wavelength 550 nm.

(b). The diameter of the pinhole is 0.537 mm.

7 0
4 years ago
A mixture can be classified as a solution, suspension, or colloid based on the
atroni [7]
The best answer choice here is B. =)
8 0
3 years ago
One the energy level diagram what is represented by the letter<br> a<br> b<br> c
Mademuasel [1]

Answer:

see below

Explanation:

B is the activation energy

A is the enthalpy change which is negative

C is the product of oxygen and ethanol which is carbon dioxide and water

hope this helps, please mark

3 0
4 years ago
A corvette starts from rest and travels 69.0 meters in 50 s. What is its acceleration?
devlian [24]

Answer:

0.0552 m/s²

Explanation:

Given:

Δx = 69.0 m

v₀ = 0 m/s

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Find: a

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69.0 m = (0 m/s) (50 s) + ½ a (50 s)²

a = 0.0552 m/s²

4 0
3 years ago
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