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3 years ago

Why is it difficult to measure diameter accurately

1 answer:

8 0

Diameter is the longest part of the circle that can be measured by taking a line across the middle point of the circle. It's hard to measure diameter accurately because you can't know which was the middle point of the circle. You must draw an imaginary line and if you are missed your calculation will be less than it should be.

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If each of the three rotor helicopter blades is 3.50 m long and has a mass of 120 kg , calculate the moment of inertia of the th

devlian [24]

Answer:

1470kgm²

Explanation:

The formula for expressing the moment of inertial is expressed as;

I = 1/3mr²

m is the mass of the body

r is the radius

Since there are three rotor blades, the moment of inertia will be;

I = 3(1/3mr²)

I = mr²

Given

m = 120kg

r = 3.50m

Required

Moment of inertia

Substitute the given values and get I

I = 120(3.50)²

I = 120(12.25)

I = 1470kgm²

Hence the moment of inertial of the three rotor blades about the axis of rotation is 1470kgm²

7 0

3 years ago

The strength of the electric field at a certain distance from a point charge is represented by e. What is the strength of the el

Masteriza [31]

Answer:

At twice the distance, the strength of the field is e/4

Explanation:

F = the strength of an electric field.

F is inversely proportional to the squared distance from the point charge.

mathematically,

F = k(e/d²)

hence, if d is doubled,keeping other forms constant

F = e/4,

7 0

4 years ago

What is the relation between electric intensity dn flux

Zepler [3.9K]

The relation between the electric intensity and electric flux is that the electric flux is equal to the scalar product of electric flux intensity and vector area.

<h3>What is the relation between electric intensity and flux?</h3>

The electric field is the field, which is surrounded by the electric charged. The electric field is the electric force per unit charge.

The intensity of this electric field is the number of electric field lines which are pass perpendicular to the unit element of fixed area.
The flux of this electric field is the number of electric field lines which are pass normally to the fixed area.

The electric flux can be given as,

$d\phi =\vec E \;dA\cos \theta$

When angle is zero,

$d\phi =\vec E \;dA\times1\\d\phi =\vec E \;dA$

Thus, the total flux is,

$\phi=\oint_{}^{}\vec E.d\vec A$

Thus, the relation between the electric intensity and electric flux is that the electric flux is equal to the scalar product of electric flux intensity and vector area.

Learn more about electric field here;

brainly.com/question/14372859

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4 0

2 years ago

Which type of arrow is being shown if viewing a physics diagram and there is a soccer ball on the grass with an arrow that shows

Nady [450]

Answer:

it is a vector arrow

a vector show the speed and direction

7 0

3 years ago

What nonliving materials are important to living things?

Pavel [41]

<span>Nonliving things also have unlimited duration of existence. While living things die and decompose, nonliving things such as rocks, mountains, air and water have existed for millions of years. They may grow, but they do so only by accretion, which is the process of growth by accumulating added layers of matter.</span>

3 0

3 years ago

Read 2 more answers