2 years ago

What is the difference between a conductor and an insulator?

Physics

1 answer:

kirill [66]2 years ago

6 0

Answer:

Explanation:

An insulator does not transfer thermal or electrical energy but a conductor does

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ankoles [38]

Answer:

model lol

Explanation:

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3 years ago

The speed of light ________ when light goes through glass.

Gala2k [10]

What happens when the light hits the glass depends on what it was in before it hit the glass.

WHILE it's in the glass, the speed of light doesn't change.

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3 years ago

A blacksmith heats a 35 g lump of iron from room temperature until it glows (2425 degrees C) to work it. If the specific heat of

Drupady [299]

Answer:

37.9 kJ

Explanation:

We can calculate the thermal energy gained by the iron using the formula:

$Q=m C_s \Delta T$

where

m = 35 g is the mass of the iron

Cs = 0.450 j/g is the iron's specific heat capacity

$\Delta T= 2425 C - 20 C = 2405 C$ is the change in temperature of the iron (assuming that the room's temperature is 20 C degrees)

Substituting numbers into the formula, we find

$Q=(35 g)(0.450 J/g)(2405 C)=3.79\cdot 10^4 J=37.9 kJ$

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3 years ago

If the velocity and frequency of a wave are both doubled, how does the wavelength change?

Sindrei [870]

The wavelength will remain unchanged.

Explanation:

The velocity $v$ of a wave in terms of its wavelength $\lambda$ and frequency $\nu$ is

$v = \lambda\nu$ (1)

so if we double both the velocity and the frequency, the equation above becomes

$2v = \lambda(2\nu)$ (2)

Solving for the wavelength from Eqn(2), we get

$\lambda = \dfrac{2v}{2\nu} = \dfrac{v}{\nu}$

We would have gotten the same result had we used Eqn(1) instead.

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2 years ago

Read 2 more answers

The specific heat of ice is 0.5 calories/gram.

svetlana [45]

Answer:

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3 years ago