3 years ago

Are these compounds ionic or covalent? CH4 Fe2O3 KNO3 C4 H2O ВеCl2

Physics

1 answer:

3241004551 [841]3 years ago

8 0

Answer: please mark me brainliest

they are covalent compounds.

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Relative motion can best be defined as

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Relative motion is the motion of an object relative to another object,
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riding on it.

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3 years ago

what is the wavelength of waves at the beach if they have a frequency of 0.3 Hz and they move at 7.1 m/s?

Reil [10]

Answer:

23.67 m

Explanation:

We are given;

Frequency; f = 0.3 Hz

Speed; v = 7.1 m/s

Now, formula to get the wavelength is from the wave equation which is;

v = fλ

Where λ is wavelength

Making λ the subject, we have;

λ = v/f

λ = 7.1/0.3

λ = 23.67 m

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3 years ago

A 0.3-m-radius automobile tire rotates how many revolutions after starting from rest and accelerating at a constant 2.13 rad/s2

Aloiza [94]

Answer:

The automobile tire rotates 91 revolutions

Explanation:

Given;

angular acceleration of the automobile, α = 2.13 rad/s²

time interval, t = 23.2-s

To calculate the number of revolutions, we apply the first kinematic equation;

$\theta = \omega_i \ + \frac{1}{2} \alpha t^2$

the initial angular velocity is zero,

$\theta =0\ + \frac{1}{2} (2.13) (23.2)^2\\\\\theta = 573.2256 \ Rad$

Find how many revolutions that are in 573.2256 Rad

$N = \frac{\theta}{2 \pi} = \frac{573.2256}{2\pi} \\\\N = 91 \ revolutions$

Therefore, the automobile tire rotates 91 revolutions

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4 years ago

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A microwave oven operates at 2.50 GHzGHz . What is the wavelength of the radiation produced by this appliance? Express the wavel

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Answer:

The wavelength is $\lambda = 1.2 * 10^8 nm$

Explanation:

From the question we are told that

The frequency of operation of the microwave is $f = 2.50 GHz = 2.50 *10^{9} \ Hz$

Generally the wavelength is mathematically represented as

$\lambda = \frac{c}{f}$

Here c is the speed of light with value $c = 3.0 *10^{8} \ m/s$

$\lambda = \frac{3.0 *10^{8}}{ 2.50 *10^{9}}$

=> $\lambda = 0.12 \ m$

converting to nanometer

$\lambda = 1.2 * 10^8 nm$

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4 years ago