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3 years ago

I need help for a assignment NOT A QUIZ

Physics

2 answers:

fomenos3 years ago

7 0

Answer:

Its C

Explanation:

Debora [2.8K]3 years ago

3 0

Answer:

what

ITS BLANK FOR ME I WISH I COULD HELP YOU

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What is the approximate percentage change in the Earth-Sun distance between June 21 and December 21?

tia_tia [17]

For the purpose of the exercise, we can assume that the Earth is at perihelion (closest point to the Sun) on December 21st (in reality, it happens around January 4th) and that the Earth is at aphelion (farthest point from the Sun) on June 21st (in reality, this happens around July 4th). The distance Earth-Sun is the following:
- Perihelion: 147.1 milion km
- Aphelion: 152.1 milion km
- Average distance: 149.6 milion km
So, we can calculate the percentage change with respect to the average distance as:
$d= \frac{d(aphelion)-d(perihelion)}{d(average)}\cdot 100= \frac{152.1-147.1}{149.6}\cdot 100=3.3 \%$

5 0

3 years ago

NEEDD SOME HELP ASAP HELP MEHHH 50 pOINTS

Vadim26 [7]

An electron shell can hold 2(n^2) electrons (technically) where n is the shell number, i.e. shell 1 can hold 2, shell 2 can hold 8, 3 holds 18 and so on.
The atomic number of Nitrogen is 7, i.e. it has 7 electrons (to match its 7 protons, assuming it isn't an ion).

With the atomic number, you simply start from shell 1 and work out. So we put 2 electrons in shell 1, leaving us with 5 left. Shell 2 can hold 6 so we can fit all 5 in.

In other words, you should have 2 electron shells on the atom, shell 1 with 2 e- and shell 2 with 5 e-.

3 0

3 years ago

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Fill in the blanks to complete each statement about energy in Earth’s crust. (use lower case wording only)

miv72 [106K]

Answer:

stress and fault

Explanation:

yes

8 0

3 years ago

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It takes Harry 34 s to walk from x1 = -11 m to x2 = -54 m .

miss Akunina [59]

Missing question:
"What is his velocity? Please answer using two sig figs in m/s."

Solution
The relationship between velocity (v), space (S) and time (t) is
 $v= \frac{S}{t}$
The space covered by Harry is
 $S=x_1 - x_2 = -11 m-(-54 m)=43 m$
and so the velocity is
 $v= \frac{43 m}{34 s} =1.26 m/s$

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4 years ago

fill in the blanks and the following paragraph should correctly describe the behavior of waves A wave is a(n)________ That carri

zepelin [54]

Answer:

1# current 2# water 3# current 4# heat

Explanation:

7 0

3 years ago

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