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Alona [7]
1 year ago
14

When working in a shop, hazardous dust can be present. What precaution should be taken? Select one:

Engineering
1 answer:
polet [3.4K]1 year ago
7 0

Answer:

a)

Explanation:

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What is bubble sort?what is bubble sort ​
juin [17]

Answer:

Bubble sort, sometimes referred to as sinking sort, is a simple sorting algorithm that repeatedly steps through the list, compares adjacent elements and swaps them if they are in the wrong order. The pass through the list is repeated until the list is sorted.

Explanation:

Look at the photo

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Which of the following methods of obtaining digitized images can recognize and preserve text and formatting?
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A cartridge electrical heater is shaped as a cylinder of length L=200 mm and outer diameter D=20 mm. Under normal operating cond
Setler79 [48]

Answer:

When water is surrounding T_s = 34.17 degree C

When air surrounding T_S = 1434.7 degree C

from above calculation we can conclude that air is less effective than water  as heat transfer agent

Explanation:

Given data:

length  = 300 mm

Outer diameter  = 30 mm

Dissipated energy = 2 kw = 2000 w

Heat transfer coefficient IN WATER = 5000 W/m^2 K

Heat transfer coefficient in air  = 50 W/m^2 K

we know that q_{convection} =  P

From newton law of coding we have

q_{convection} =  hA(T_s -  T_{\infity})

T_s is surface temp.

T - temperature at surrounding

P = hA(T_s -  T_{\infity})[tex]\frac{P}{\pi hDL} =  (T_s -  T_{\infity})

solving for[/tex] T_s [/tex] w have

T_s = T_{\infty} + \frac{P}{\pi hDL}

T_s = 20 + \frac{2000}{\pi 5000\times 0.03\times 0.3}

T_s = 34.17 degree C

When air is surrounding we have

T_s = T_{\infty} + \frac{P}{\pi hDL}

T_s = 20 + \frac{2000}{\pi 2000\times 0.03\times 0.3}

T_s = 1434.7 degree C

from above calculation we can conclude that air is less effective than water  as heat transfer agent

5 0
4 years ago
A 2-m^3 rigid tank contains nitrogen gas at 500kPa and 300K. Now the gas is compressed isothermally to a volume of 0.1 m. The wo
stira [4]

Answer:

(d) 2996 kJ

Explanation:

We have given initial volume v_1=2m^3

initial pressure p_1=500\ kPa

initial temperature T_1=300\ K

we know that during  isothermal process the work done is given by

W=p_1v_1ln\frac{v_2}{v_1}

where v_2= final\ volume =0.1m^3\ given

putting all these value in formula of work done

W=500\times 2\times ln\frac{0.1}{2}

=-2995.8 kJ here negative sign indicates that work is dine on the gas

so wok done =2995.8 kJ

8 0
3 years ago
The type of electricity that the Greeks disovered that was created by rubbing amber with variuous materials is called.....
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B. Static electricity, I think
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