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katovenus [111]
3 years ago
13

How are the raincoats waterproof? explain​

Physics
1 answer:
Reil [10]3 years ago
7 0

Answer:

Rain jackets are coated in durable water-repellant (DWR) finish, a hydrophobic glaze that allows the coats to be breathable, yet waterproof. It lets water vapor—like sweat—out, but keeps rain from getting in. ... Without a DWR, the raincoat is just a coat. So, you'll need to recoat it.

Explanation:

This is according to the web

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A physics major is cooking breakfast when he notices that the frictional force between the steel spatula and the Teflon frying p
wel

Answer:

Normal force = 8.75 N

Explanation:

given,

frictional force between the steel spatula and the Teflon frying pan=0.350 N

coefficient of friction between material =0.04

normal force = ?

using formula,

Frictional force = coefficient of friction × normal force

normal\ force = \dfrac{Frictional\ force}{coefficient\ of\ friction}

normal\ force = \dfrac{0.350}{0.04}

Normal force = 8.75 N

8 0
3 years ago
Calculate the size of the labor force. The size of the adult population is 30,000. The number working is 17,700 and the number o
allsm [11]

Answer:

The size of the labor force is 19300.

Explanation:

Given that,

Adult population = 30000

Number of  employed = 17700

Number of unemployed = 1600

Suppose, The labor force is comprised of those who are working for any number of hours (the employed) and those who are out of work but actively looking for a job the unemployed)

We need to calculate the size of the labor force

The labor force is comprised of number of employed person and number of unemployed person.

That means,

Labor Force = Employed + Unemployed

F_{l}=17700+1600

F_{l}=19300

Hence, The size of the labor force is 19300.

4 0
3 years ago
Read 2 more answers
The function of thick gloves worn by electricians is to _________.
Vilka [71]
The answer is A

Hope it helps!

4 0
3 years ago
An electron emitted from a filament is travelling at 1.5 x 105 m/s when it enters an acceleration of an electron gun in a televi
Crank

Answer:

The acceleration of the electron is 1.457 x 10¹⁵ m/s².

Explanation:

Given;

initial velocity of the emitted electron, u = 1.5 x 10⁵ m/s

distance traveled by the electron, d = 0.01 m

final velocity of the electron, v = 5.4 x 10⁶ m/s

The acceleration of the electron is calculated as;

v² = u² + 2ad

(5.4 x 10⁶)² = (1.5 x 10⁵)² + (2 x 0.01)a

(2 x 0.01)a = (5.4 x 10⁶)² - (1.5 x 10⁵)²

(2 x 0.01)a = 2.91375 x 10¹³

a = \frac{2.91375 \ \times \ 10^{13}}{2 \ \times \ 0.01} \\\\a = 1.457 \ \times \ 10^{15} \ m/s^2

Therefore, the acceleration of the electron is 1.457 x 10¹⁵ m/s².

7 0
3 years ago
Even under the most ideal conditions, only about 8% of the internal energy of the steam produced in a steam engine can be conver
Anna71 [15]
As per the law of conservation of energy, no energy is created or destroyed. Therefore, we can conclude that the remaining 92% of energy released in electricity generation from steam power plants is converted to other, non-utilizable forms of energy. Such forms include sound energy or thermal energy between the moving parts of the plant.
8 0
4 years ago
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