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3 years ago

Explain why some electrical devices feel warm to the touch when they have been on for a long time.

Physics

1 answer:

Igoryamba3 years ago

6 0

Answer:

More than likely, if an outlet is warming up, it is because you are overloading it. Another common reason why electrical outlets get warm over time is that the casing around the electrical outlet, the outlet itself or even its wiring could be damaged.

Explanation:

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How do magnetic stripes show the history of earth's magnetic field?

Mama L [17]

If i could heat a piece of iron so that it melted, and then held a magnet close to the molten iron and then let the iron cool to room temperature, you could use a microscope to look at the iron and tell that a magnet had been present during cooling. you could even tell if it was the north or south pole of the magnet that i held close to the molten iron.

Magma/lava contains a lot of molten iron so that when it erupts from a volcano and cools, the magnetic field of the earth leaves an imprint in it, just like the cooling iron from above. From this imprint we can tell the strength of the magnetic field and also which direction the north and south poles were at the time.

3 0

3 years ago

What is the toy's total energy at any point of its motion? Express your answer with the appropriate units.]

suter [353]

The complete question is as follows:

A 0.150-kg toy is undergoing SHM on the end of a horizontal spring with force constant k = 300 N/m. When the toy is 0.0120 m from its equilibrium position, it is observed to have a speed of 0.400 m/s.

Answer:

The correct answer is 0.034 J.

Explanation:

Given :

mass of the toy is m = 0.15 kg.

The force constant of restoring force k = 300 Nm⁻¹

When the position of the toy from the equilibrium is x = 0.012m, then the

speed of the toy vx = 0.4m s

The total mechanical energy in SHM is given by

E= 1/2 (mv²+ kx²) = 1/2 kA²

(here, m = mass of the object, vx = velocity, k = force constant

of restoring force, and A = amplitude of SHM.)

Hence by substituting the numerical values in equation 1, we get

$E= \frac{1}{2} (0.15* 0.4) + \frac{1}{2} (300* 0.012)$

= 0.034 J

Thus, the correct answer is 0.034 J.

6 0

3 years ago

What energy transformation happening when starting a car

cestrela7 [59]

Answer:

Explanation:

We're starting a car. We have the fuel in the engine, and when the engine starts, that fuel is converted into power to move the car. The fuel is made of chemicals, right? Propane, gasoline, so on. What kind of energy comes from chemicals? Chemical energy, right?

That fuel is chemical energy, and the energy to move the car must be kinetic/mechanical energy. However, that's not the only source of mechanical energy.

There's another source of mechanical energy here as well: we have an electric battery. What kind of energy is found in a battery? The battery has electricity, and so it has electrical energy. Some of that electrical energy turns into mechanical energy when the car starts up.

But the engine heats up as well, right? There's one more energy that the electrical energy and chemical energy produce here: thermal energy. That's the source of the heat.

I hope this makes sense for you. Have a wonderful day!

3 0

3 years ago

: Click Play. Observe how the position of the red dot in the SIMULATION pane relates to the cycle of night and day on the 2D VIE

Korolek [52]

Answer:

rotating movement on itself, it creates the phenomenon of day and night.

Explanation:

When a body that rotates around a star (translational movement), rotates on itself (rotational movement), the light from the star cannot reach the opposite part of the object, so at these points it is NIGHT and when in the rotation movement the point is in front of the star it is DAY.

Therefore, in rotating movement on itself, it creates the phenomenon of day and night.

5 0

3 years ago

What term is defined as speed with a specific direction?

skelet666 [1.2K]

IT IS A : VELOCITY (Please give me brainliest)

6 0

3 years ago