Looking for something else?

Not the answer you are looking for? Search for more explanations.

## More answers

Looking for something else?

Not the answer you are looking for? Search for more explanations.

- richgall____

Medal!
Part A: The sun produces 3.9 ⋅ 10^33 ergs of radiant energy per second. How many ergs of radiant energy does the sun produce in 1.55 ⋅ 10^7 seconds?
Part B: Which is the more reasonable measurement of the distance between the tracks on a CD:
1.6 ⋅ 10^–3 mm or 1.6 ⋅ 10^3 mm? Justify your answer.

Get our expert's

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this

and **thousands** of other questions.

Get your **free** account and access **expert** answers to this and **thousands** of other questions

- richgall____

- schrodinger

See more answers at brainly.com

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this

and **thousands** of other questions

- PhantomCrow

Do you know how to multiply scientific notation?

- richgall____

i have the ti-84 calculator that multiplies things

- richgall____

like this

Looking for something else?

Not the answer you are looking for? Search for more explanations.

- PhantomCrow

Right, but we want to multiply it without expanding it. Do you know how to multiply the numbers keeping them in scientific notation?

- richgall____

no

- PhantomCrow

Okay. First, we multiply the decimal number. After, we keep the base of ten and add the exponents (since we add exponents when multiplying the same base)

- PhantomCrow

What do you get?

- richgall____

so do i multiply 3.9 times 1.55?

- PhantomCrow

Yes

- richgall____

6.045

- richgall____

and with the expontents part it will be 10^40

- PhantomCrow

Yep! So your answer is 6.045 x 10^40

- PhantomCrow

As for part B, remember that a negative exponent on ten means that the number is less than 1 and any positive exponent is equal to or greater than 1.

- richgall____

SO i multiply 1.6 ties 1.6??

- richgall____

*multiply

- PhantomCrow

No. It's asking you to chose between two measurements for the distance between two tracks on a CD.

- richgall____

I think 1.6 time 10^3

- PhantomCrow

1.6 x 10^3 mm = 1.6 meters
1.6 x 10^-3 mm = 0.0016 mm.
In the scale of a CD, which one would be logical?

- richgall____

first one
?

- PhantomCrow

Yes. But do you see why it is?

- richgall____

Yea because tracks are like the song and it takes longer time to switch between them

- PhantomCrow

Also, because a CD is nowhere near 1.6 meters in diameter.

Looking for something else?

Not the answer you are looking for? Search for more explanations.