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3 years ago

Covalent bonds ___ conduct electricity well. Always Usually Rarely Never

Physics

2 answers:

enot [183]3 years ago

8 0

Covalent bonds never conduct electricity well.

Answer: Option D

<u>Explanation:</u>

For a metal or conductor to conduct electricity, there must be free electrons moving freely on the outermost orbit so that when there is a potential difference, the electrons flows and produce electricity by theory motion.

Hence the outermost shell must be unstable for a conductor, else there will be no free electrons. In covalent bonds, electrons are shared which makes them difficult to move and produce electricity.

mr_godi [17]3 years ago

4 0

They rarely conduct electricity well.

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Two cars, initially 12 meters apart, zip towards one another at the speeds shown. At what point will the collision occur? Explai

ivolga24 [154]

Answer:

s₁ = 4.67 m from car A

Explanation:

Since, the cars are moving at a constant speed. Hence, we will apply the equation for uniform motion here:

s = vt

where,

s = distance covered

v = velocity

t = time taken

For Car A:

s₁ = (1.4 m/s)t

For Car B:

s₂ = (2.2 m/s)t

Because the time will be same at the collision. At collision the distance covered by Car A and Car B must be 12 m altogether. Hence:

s₁ + s₂ = 12 m

using values:

(1.4 m/s)t + (2.2 m/s)t = 12 m

t = 12 m/3.6 m/s

t = 3.333 s

Substitute this in the equation of s₁:

s₁ = (1.4 m/s)(3.33 s)

4 0

3 years ago

Two guitars are playing together producing a beat frequency. The first guitar is playing at a frequency of 867 Hz and the beat i

IgorLugansk [536]

Answer:

892 Hz or 842 Hz

Explanation:

Given

The frequency of first guitar is 867 Hz

Beat is produced for every 0·04 s

∴ Beat has a time period of 0·04 s

<h3>Beat frequency is defined as the inverse of the time period of the beat </h3>

Beat frequency = 1 ÷ (Time period) = 1 ÷ 0·04 = 25 Hz

Let the frequency of the second guitar be f Hz

<h3>Beat frequency is defined as the absolute difference between the two frequencies</h3>

∴ Beat frequency = (867 - f) or (f - 867)

First case

25 = 867 - f ⇒ f = 842 Hz

Second case

25 = f - 867 ⇒ f = 892 Hz

∴ Possible frequencies of second guitar could be 892 Hz or 842 Hz

4 0

3 years ago

The electric field of a sinusoidal electromagnetic wave obeysthe equation

Firdavs [7]

Answer with Explanation:

We are given that

$E=-(375V/m)sin(5.97\times 10^{15}(rad/s)t+(1.99\times 1067(rad/m)x)$

a.General equation of electric field wave

$E=E_0sin(\omega t+kx)$

Where $E_0$ =Amplitude of electric field wave

By comparing

$\omega=5.97\times 10^{15}rad/s$

$k=1.99\times 10^7rad/m$

a.Amplitude of electric field wave= $E_0=375V/m$

b.Amplitude of magnetic field wave, $B_0=\frac{E_0}{c}$

Where $c=3\times 10^8 m/s$

Amplitude of magnetic field wave= $B_0=\frac{375}{3\times 10^8}=125\times 10^{-8} T$

c.Frequency of wave, $f=\frac{\omega}{2\pi}=\frac{5.97\times 10^{15}}{2\pi}=0.95\times 10^{15}Hz$

d.Wavelength, $\lambda=\frac{2\pi}{k}$

$\lambda=\frac{2\pi}{1.99\times 10^7}=3.16\times 10^{-7} m$

e.Period of wave, $T=\frac{1}{f}=\frac{1}{0.95\times 10^{15}}=1.05\times 10^{-15} s$

f.Speed of wave, $v=f\lambda=0.95\times 10^{15}\times 3.16\times 10^{-7}=3.00\times 10^8 m/s$

5 0

4 years ago

What factors do Presidents consider when choosing a Supreme Court Justice?

horsena [70]

Answer:

Presidents use the same criteria: legal expertise, party affiliation, philosophy, an da sense of the acceptability to the Senate. Define majority opinion, concurring opinion, and dissenting opinion.

Explanation:

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3 years ago

How long will it take for sound impulse to travel to Copper Rod 25 kilometers long?

Tema [17]

Answer:

that's my answer to your question

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3 years ago