2 years ago

전기를 사용하여 다른 재료에 원하는 금속 층을 증착하는 과정을 ____라고 합니다.

Physics

1 answer:

Jet001 [13]2 years ago

4 0

Answer:

This process is termed galvanisation

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In a car with a mass of 4,000 KG is accelerating at a rate of 2m/s2 and hits a tree what force does it have

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According to Newton's second law of motion, the acceleration of a body is directly proportional to the force acting on the body and inversely proportional to its mass. The formula for this law is

F=ma

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3 years ago

The length and mass of the arm are Larm = X1 = 50 cm and Marm = 0.3 kg, X2 = 15 cm, and the mass of the object is MObject = 0.25

max2010maxim [7]

Answer: 0.5N

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But if they are not in equilibrium.

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find the attached file for solution

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3 years ago

Motor oil , with a viscosity of 0 . 250 Ns / m2 , is flowing through a tube that has a radius of 5 . 00 mm and is 25 . 0 cm long

Thepotemich [5.8K]

Answer:

1.1775 x 10^-3 m^3 /s

Explanation:

viscosity, η = 0.250 Ns/m^2

radius, r = 5 mm = 5 x 10^-3 m

length, l = 25 cm = 0.25 m

Pressure, P = 300 kPa = 300000 Pa

According to the Poisuellie's formula

Volume flow per unit time is

$V=\frac{\pi \times Pr^{4}}{8\eta l}$

$V=\frac{3.14 \times 300000\times \left ( 5\times 10^{-3} \right )^{4}}{8\times 0.250\times 0.25}$

V = 1.1775 x 10^-3 m^3 /s

Thus, the volume of oil flowing per second is 1.1775 x 10^-3 m^3 /s.

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Which scientist began organizing elements into the periodic table?

Gre4nikov [31]

Answer:

B. Dmitri Mendeleev

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he invented it

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