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BaLLatris [955]
4 years ago
10

Which is an example of conduction?

Physics
2 answers:
cupoosta [38]4 years ago
8 0
A hand is burned when touching a pot handle
tatuchka [14]4 years ago
7 0

Answer: The correct answer is a hand is burned when touching a pot handle.

Explanation: There are 3 modes of heat transfer:

Conduction: This type of heat transfer happens when there is direct contact between the two object.

Convection: This type of heat transfer happens when there is a movement of fluid (liquid or gas).

Radiation: This type of heat transfer happens when there is direct transfer of energy through space.

From the given options,

A hand is burned when touching a pot handle is an example of conduction because there is direct contact between the hand and pot handle.

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1. This image shows the various forces acting on a block of rock situated on a rock slope. What does arrow 4 represent?
Gelneren [198K]

Answer:

B. Gravitational force

Explanation:

The gravitational force of an object (also called weight) is given by

F=mg

where m is the mass of the object and g is the acceleration of gravity, and it always points in the downward direction.

In this problem, the arrow labelled with 4 is the only force pointing downward: therefore, it must be the gravitational force.

The other arrows represent:

1 --> component of the gravitational force parallel to the plane

2 --> force of friction

3 --> component of the gravitational force perpendicular to the plane

8 0
3 years ago
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Sonar signals and infrared light are are used to send messages to submarines deep under water. If we compare the two signals, wh
WARRIOR [948]
What are the statement choices?
6 0
3 years ago
If an object is travelling faster than its own sound waves, which of the following is created?
Andrej [43]

Answer:

D

Explanation:

When an object travels faster than the speed of sound, a sonic boom is created. A ring of pressure waves (probably why wave destruction and pressure cooker are options lol) are created, which is why when you see a jet make a sonic boom there looks like a ring shaped cloud behind it. Hope this helps! For further confirmation/information, just look up sonic boom science (or else you will get sonic boom the video game)

7 0
3 years ago
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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 chicken is running in a circular path with an angular speed of 1.52 rad/s. How long does it take the chicken to complete one r
Zielflug [23.3K]

Answer: approximately 4 seconds

Explanation:

1.52 is approximately pi/4

2pi rad is 360°

Pi/4 rad is 90°

So the chicken runs one-fourth of the path in one second so it runs the hole path in four minutes

7 0
3 years ago
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