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3 years ago

Explain some methods of reducing friction between of matyer

Mathematics

1 answer:

Simora [160]3 years ago

7 0

Answer:

Step-by-step explanation:

1. Use of lubricants

Lubricants like oil and grease helps to decrease friction by forming a thin film in between different parts of the machine. This film covers up the scratches and bumps on the surfaces of different parts. This reduces interlocking between the two surfaces. Thus reducing the friction.

2. Use ball bearings

Two moving surfaces in a machine are attached by placing small steel balls or steel rollers in between them. This way, the moving parts avoid direct contact and the force of sliding friction turns into rolling friction. Rolling friction is less than sliding friction, in doing so reducing the friction.

3. Polishing

Polishing reduces the unevenness of a surface. This will reduce interlocking between the surfaces.

4. Streamlining

Streamlining is the process where you make a machine in a shape that avoids air and water resistance. This reduces friction because a streamlined object cuts through the water and air molecules.

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NemiM [27]

Answer:

B. 314 cm³

Step-by-step explanation:

We are given that,

Height of the cone = 12 cm

Radius of the cone = 5 cm

<em>Since, we need to fill the cone with the cement. So, we will find the volume of the cone.</em>

So, Volume of the cone = $\frac{1}{3}\pi r^{2}h$

i.e. Volume of the cone = $\frac{1}{3}\pi 5^{2}\times 12$

i.e. Volume of the cone = $\frac{1}{3}\times 3.14 \times 25\times 12$

i.e. Volume of the cone = $\frac{942}{3}$

i.e. Volume of the cone = 314 cm³

Hence, the amount of cement they can put in each cone is 314 cm³.

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lukranit [14]

Answer:

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3 years ago

Manny bought a shirt at 70% of the regular price. He paid $ 33.60 for the shirt. What was the regular price

irga5000 [103]

Answer:

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4 years ago

Using the image above, what is the measure of Side AC? Round to the nearest hundredth

Evgesh-ka [11]

To solve this problem, we just have to use trigonometric ratios and apply which of the ratios is needed here and proceed to solve. The value of side AC is 2.85 units

<h3>Trigonometric Ratio</h3>

In the given diagram, we have the value of angle and hypothenuse and we are required to find the adjacent side of the triangle.

Data;

Angle = 32.9 degrees
Hypothenuse = 3.4

Let's use cosine rule for this.

$cos\theta = \frac{adjacent}{hypothenuse}$

Proceed to substitute the values into the equation and solve.

$cos 32.9 = \frac{AC}{3.4} \\AC=3.4cos32.9\\AC = 2.85$

From the calculations above, the value of side AC is 2.85 units

Learn more on trigonometric ratio here;

brainly.com/question/11967894

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2 years ago

14. The height of an office building is 114.425 meters. The height of an art museum if 114.58 meters. Which statement correctly

guapka [62]

114.425<114.58 because 425<580.

The easiest way to reach this solution is to look at the numbers. Everything before the decimal point is the same, but the first digit after the place holder differs, one is four tenths and the other is 5 tenths. 4 is less than 5 making the first statement the correct one!

7 0

4 years ago

Explain some methods of reducing friction between of matyer​

Explain some methods of reducing friction between of matyer