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3 years ago

But how can the only number that is less than 4 or equal to 4 be 8

Physics

1 answer:

Assoli18 [71]3 years ago

4 0

However, consequently and moreover, we need to know everything before "but".

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A uniform rod rotates in a horizontal plane about a vertical axis through one end. The rod is 3.46 m long, weighs 12.8 N, and ro

Mkey [24]

Answer:

a. Rotational inertia: 5.21kgm²

b. Magnitude of it's angular momentum: 123.32kgm²/s

Explanation:

Length of the rod = 3.46m

Weight of the rod = 12.8 N

Angular velocity of the rod= 226 rev/min

a. Rotational Inertia (I) about its axis

The formula for rotational inertia =

I = (1/12×m×L²) + m × ( L ÷ 2)²

Where L = length of the rod

m = mass of the rod

Mass of the rod is calculated by dividing the weight of the rod with the acceleration due to gravity.

Acceleration due to gravity = 9.81m/s²

Mass of the rod = 12.8N/ 9.81m/s²

Mass of the rod = 1.305kg

Rotational Inertia =

(1/12× 1.305 × 3.46²)+ 1.305 ( 3.46÷2)²

Rotational Inertia = 1.3019115 + 3.9057345

Rotational Inertia = 5.207646kgm²

Approximately = 5.21kgm²

b. The magnitude of the rod's angular momentum about the rotational axis is calculated as

Rotational Inertia about its axis × angular speed of the rod.

Angular speed of the rod is calculated as= (Angular velocity of the rod × 2π)/60

= (226×2π) /60

= 23.67 rad/s

Rotational Inertia = 5.21kgm²

The magnitude of the rod's angular momentum about the rotational axis

= 5.21kgm²× 23.67 rad/s

= 123.3207kgm²/s

Approximately = 123.32kgm²/s

7 0

4 years ago

What scientific discovery did Daniel Bernoulli work on with Leonhard Euler?

Dmitriy789 [7]

He worked with Euler on elasticity and the development of the Euler-Bernoulli beam equation.

8 0

3 years ago

From the center of the Earth to the moon, what should the orbital radius of such satellite be in order to stay over the same poi

yulyashka [42]

In order to have a period that matches the Earth's rotation, a satellite must be in a circular orbit, and 42,164 km from the center of the Earth.

But that's not quite enough to make sure that it always stays over the same point on the Earth's surface (and appears motionless in the sky). For that to happen, the satellite's orbit has to be directly over the Equator.

The Moon has nothing to do with any of this.

3 0

3 years ago

A baseball with a mass of 0.8 kg is given an acceleration of 20m/s.how much force was applied to the ball

Delicious77 [7]

F=mass x acceleration = ma= 0.8*20 = 16N

5 0

3 years ago

One of the many by products of uranium is radioactive plutonium, which has a half life of approximatley 25000 ytears. if some of

strojnjashka [21]

Answer:

0.9972 fraction of plutonium will remain after 100 years.

Explanation:

Half life of plutonium = $t_{1/2}=25000 years$

Let the initial mass of plutonium be = $A_o$

Mass of plutonium after time of 100 years = A

Decay constant for this process = $\lambda =\frac{0.693}{t_{1/2}}$

$A=A_o\times e^{-\lambda t}$

$A=A_o\times e^{-\frac{0.693}{25000 years}\times 100 year}$

$A=A_o\times 0.9972$

$\frac{A}{A_o}=0.9972$

0.9972 × 100 = 99.72 %

0.9972 fraction of plutonium will remain after 100 years.

8 0

4 years ago

But how can the only number that is less than 4 or equal to 4 be 8​

But how can the only number that is less than 4 or equal to 4 be 8