2 years ago

Which material is a good heat conductor ?

Physics

1 answer:

Eduardwww [97]2 years ago

6 0

Answer:

wood lighters gasoline hope it helps

Explanation:

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A positively-charged object with a mass of 0.129 kg oscillates at the end of a spring, generating ELF (extremely low frequency)

9966 [12]

Answer:308 N/m

Explanation:

Given

mass $\left ( m\right )=0.129 kg$

wavelength $\left ( \lambda \right )=3.86\times 10^7$

We know frequency = $\frac{c}{\lambda }=\frac{3\times 10^8}{3.86\tmes 10^7}$

f=7.772 Hz

As the frequency of radio waves is same as the frequency at which object oscillates

$f=\frac{1}{2\pi }\sqrt{\frac{k}{m}}$

$7.772=\frac{1}{2\pi }\sqrt{\frac{k}{0.129}}$

$7.772\times 2\times \pi =\sqrt{\frac{k}{0.129}}$

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4 years ago

A rock is dropped from a sea cliff and hits the water 3.2s later. How high is the cliff? How long would it take sound to travel

Kruka [31]

A rock is dropped from a sea cliff and hits the water 3.2s later. How high is the cliff?

t = sqrt(2y/g)
3.2 = sqrt(2y/9.81)
y = 50.23 m

How long would it take sound to travel the same distance?
t = 50.23 / 343 m/s
t = 0.15 s

How long would it take light to travel this distance?
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t = 1.68x10^-7 s

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3 years ago

Which material is a good heat conductor ?​

Which material is a good heat conductor ?