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2 years ago

Why does the chord of an electric heater not glow while the heating element does

Physics

1 answer:

8_murik_8 [283]2 years ago

4 0

Answer:

The heating element of the heater is made up of alloy which has very high resistance so when current flows through the heating element, it becomes too hot and glows red. But the resistance of cord which is usually of copper or aluminum is very low so it does not glow.

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gizmo_the_mogwai [7]

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Explanation:

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2 years ago

A dog walking to the right at 1.5\,\dfrac{\text m}{\text s}1.5sm1, point, 5, space, start fraction, m, divided by, s, end fract

Tatiana [17]

Answer:

8.6 m/s

Explanation:

We can find the final velocity of the dog by using the following SUVAT equation:

$v^2-u^2=2ad$

where

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a is the acceleration

d is the distance covered

For the dog in the problem, we have

u = 1.5 m/s

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And the distance covered is

d = 3.0 m

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$v=\sqrt{u^2+2ad}=\sqrt{1.5^2+2(12)(3.0)}=8.6 m/s$

6 0

2 years ago

A 0.2 kg hockey puck moving at 80 m/s is caught by a 40 kg goalie at rest. With what speed does the goalie slide on the slide?

Lady_Fox [76]

Answer:

V = 0.39 m/s

Explanation:

Given that,

Mass of hockey puck, m = 0.2 kg

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$mv=(M+m)V\\\\V=\dfrac{mv}{M+m}\\\\V=\dfrac{0.2\times 80}{0.2+40}\\\\V=0.39\ m/s$

So, the required speed is 0.39 m/s.

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1 year ago

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liraira [26]

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2 years ago

The force that probably propels the movement of the earth s gigantic rock plates is

il63 [147K]

The correct answer is:

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Explanation:

Tectonic plates are ready to move because the Earth's lithosphere has higher strength than the underlying asthenosphere. Lateral density changes in the mantle appear in convection. Plate movement is believed to be driven by a succession of the motion of the seafloor apart from the extended ridge (due to variations in topography and density of the crust.

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2 years ago

Why does the chord of an electric heater not glow while the heating element does​

Why does the chord of an electric heater not glow while the heating element does