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OleMash [197]
3 years ago
10

The instrument used to measure the diameter of a thin wire is​

Physics
2 answers:
BARSIC [14]3 years ago
4 0
Micrometer

Micrometer is used to measure diameter of a thin wire.
Pie3 years ago
3 0

micrometer is used to measure the diameter of a thin wire

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Which of the following statements does NOT use the term angular size or angular distance correctly?
Verizon [17]

Answer: Statement 1 is incorrect.

Reason:

Unit of measure of angular distance is not meters.

Explanation:

The term 'angular size' is used to describe the apparent size of the objects in the night sky.

The angular distance is defined as the angle through which an object moves on a circular path. The SI unit is radian.

Other units are revolution (rev) and degrees.

In statement 1, angular distance is measured in meters which is incorrect. In other options, there is no factual mistake so they are correct.

Let's discuss them,

Statement 2:

Here, we are talking about the use of outstretched hand to estimate the angular distances and sizes which is correct.

Statement 3:

This statement talks about the same angular sizes of the sun and the moon, here the term is again used correctly.

Statement 4:

Here, the angular distance is measured in the correct units i.e, degrees so this statement is also correct.

3 0
3 years ago
Indicar objetosque puedan ser observados a simple vista, con microscopio, con microscopio electrico y con miscroscopio de transm
AysviL [449]

Answer:

En esta respuesta voy a usar la unidad μm, tal que:

1 μm = 1*10^(-9) m

Objetos que pueden ser observados a simple vista:

Son todos aquellos objetos que podemos observar simplemente con nuestros ojos, con ellos podemos observar desde un edificio (con tamaños de decenas de metros) hasta algunos cabellos, que pueden tener un diámetro de 0.1 mm

Cosas más pequeñas que estás muy difícilmente se pueden ver a simple vista.

Con un microscopio podremos ver cosas del tamaño de una célula, como glóbulos blancos, rojos, algunos microorganismos, etc, los cuales rondan un tamaño de unos 10 μm. Naturalmente, distintos microscopios tendrán distintas amplificaciones (por lo que con algunos podremos ver objetos muy pequeños que con otros no).

Microscopio eléctrico:

Este microscopio usa electrones en lugar de luz para formar imágenes.

Con él podremos observar cosas como las componentes de una célula (membranas, orgánulos grandes, etc), los cuales pueden medir unos pocos nanómetros (por ejemplo, una membrana celular tendrá un tamaño de entre 5 μm y 10 μm)

Microscopio de transmisión.

Tener en cuenta que el microscopio de transmisión es un microscopio eléctrico, el cual lanza un haz de electrones al objeto que se desea observar, de tal forma que algunos de estos electrones rebotan formando así la imagen virtual amplificada que podemos observar.

Con estos aparatos podemos ver orgánulos pequeños (0.5 μm), y lo más pequeño que podemos ver (con los microscopios más potentes) son columnas de átomos (0.1 μm)

6 0
3 years ago
A uniform thin rod of length 0.11 m and mass 4.6 kg can rotate in a horizontal plane about a vertical axis through its center. T
ale4655 [162]

Answer:

Explanation:

This problem is based on conservation of rotational momentum.

Moment of inertia of rod about its center

= 1/12 m l² , m is mass of the rod and l is its length .

= 1 / 12 x 4.6 x .11²

I = .004638 kg m²

The angular momentum of the bullet about the center of rod = mvr

where m is mass , v is perpendicular component of velocity of bullet and r is distance of point of impact of bullet fro center .

5 x 10⁻³ x v sin60 x .11 x .5  where v is velocity of bullet

According to law of conservation of angular momentum

5 x 10⁻³ x v sin60 x .11 x .5 = ( I + mr²)ω , where ω is angular velocity of bullet rod system and  ( I + mr²) is moment of inertia of bullet rod system .

.238 x 10⁻³ v = ( .004638 + 5 x 10⁻³ x .11² x .5² ) x 12

.238 x 10⁻³ v = ( .004638 + .000015125 ) x 12

.238 x 10⁻³ v = 55.8375 x 10⁻³

.238 v = 55.8375

v = 234.6 m /s

4 0
3 years ago
The mass of an ice block is 500kg and density is 920kg\m^3. calculate the volume of an ice block ​
disa [49]
0.107

That the answer. Mark me brainlieat plz
7 0
3 years ago
1.
lesya [120]

Answer:

Terrorists:scary,ruthless,morbid. Pretty:beautiful,sweet. Gay:happy,sweet,nice

Explanation:

Reeee

5 0
3 years ago
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