3 years ago

A school bus transporting students to school is an example of

Physics

2 answers:

Akimi4 [234]3 years ago

5 0

Kinetic energy is your answer

jok3333 [9.3K]3 years ago

3 0

Answer:

The answer is D. If I got this right will you please mark me as Brainliest.

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Calculate the broadcast wavelength of the radio station 99.90 fm. seconds

taurus [48]

The radio waves are electromagnetic wave, so it travels with velocity of light i.e $3\times 10^{8} \ m/s$ .

We can use the relation between frequency, wavelength and speed as

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

Here c is speed of light, $\lambda$ is wavelength and f is frequency and its value is given 99.90 FM, it is actually in megahertz (i.e 99.90 MHz).

Therefore,

$\lambda =\frac{3 \times 10^{8}\ m/s }{99.90 \times 10^{6} \ Hz} = 3.003 \ m$ .

Thus, the broadcast wavelength of the given radio station is 3.003 m.

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Integrated Science- 8th grade science

padilas [110]

Answer:

A. a rigorously tested explanation

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B. and D. are out - theories are not opinionated, they are factual
C. is out - not all theories are mathematical
A. is the best choice

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2 years ago

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if the intensity of a person's voice is 4.6 x 10^-7 w/m^2 at a distance of 2.0 m, how much sound power does that person generate

777dan777 [17]

The sound power the person generated is $2.313 \times 10^{-5} \ W$ .

<h3>Area of the sound wave</h3>

The area of the sound wave is calculated as follows;

$A = 4\pi r^2\\\\A = 4 \pi \times (2)^2\\\\A = 50.272 \ m^2$

<h3>Power generated</h3>

The sound power the person generated is calculated as follows;

$P = I A\\\\P = 4.6\times 10^{-7} \ W/m^2 \ \ \times \ \ 50.272 \ m^2\\\\P = 2.313 \times 10^{-5} \ W$

Learn more about intensity of sound here: brainly.com/question/4431819

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the answer is tropical rainfores

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