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3 years ago

8.What causes an Aurora?

SAT

2 answers:

kkurt [141]3 years ago

8 0

Answer:

When charged particles from the sun strike atoms in Earth's atmosphere, they cause electrons in the atoms to move to a higher-energy state. When the electrons drop back to a lower energy state, they release a photon: light. This process creates the beautiful aurora, or northern lights.

givi [52]3 years ago

5 0

Answer:

Explanation:

UwU I know this because I'm subscribed to Jacksepticeye, Me Big Brain

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Does anyone else wish they could go to school to avoid their mental abusive family?

OverLord2011 [107]

Answer:

Explanation:

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3 years ago

Read 2 more answers

Frank, who lives in texas, and his sister lilly, who lives in japan, correspond regularly. From what he can tell from the postma

ehidna [41]

Answer:

(A) There is convincing evidence that there is no difference in the mean delivery times.

(B) There is convincing evidence that there is a difference in the mean delivery times.

(C) There is convincing evidence that the mean delivery time from Japan to Texas is greater than the mean delivery time from Texas to Japan.

(D) There is not convincing evidence that the mean delivery time from Japan to Texas is greater than the mean delivery time from Texas to Japan.

(E) The t-test cannot be used for sample sizes that are this small.

Explanation:

The correct option is;

(A) There is convincing evidence that there is no difference in the mean delivery times.

Step-by-step explanation:

Here we have the formula for the two-sample t-test given s;

To Texas N₁ = 12, =8.74 σ₁ = 2.92 SE Mean₁ = 0.84

To Japan N₂ = 9 = 6.75 σ₂ = 2.56 SE Mean₁ = 0.85

t = 1.667

Where the null hypothesis is

mu To Texas = mu To Japan and the alternative is

mu To Texas > mu To Japan

Here since the observed P value of P = 0.058 is greater than the significance level of 0.05 we fail to reject the null hypothesis and we will therefore, not accept the alternative hypothesis.

Hence, there is convincing evidence that there is no difference in the mean delivery times.

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2 years ago

A student drops an object from rest above a force plate that records information about the force exerted on the object as a func

Masteriza [31]

The correct answer to what additional measurement the student requires is; D. The student has enough information to make the determination

<h3>Understanding Change in Momentum</h3>

Formula for change in momentum is;

ΔP = m(v - u)

Now, this change in momentum is also equal to impulse which has the formula; Impulse = Force(F) × Time(t)

I = F × t

Thus;

m(v - u) = F × t

Now, we are given;

Force exerted on the object and the time interval. Thus;

ΔP = F × t

Thus, the student has enough information to find the change in momentum

The missing options are;

a. The mass of the object.

b. The final speed of the object MOH 5000

c. The distance fallen by the object

d. The student has enough information to make the determination

Read more about Impulse and Change in momentum at; brainly.com/question/20586658

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2 years ago

When you lose your bsf and you dont know what to do....

DIA [1.3K]

Answer:

my mind went... "BOOM!*

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3 years ago

John F. Kennedy: What are some of the best JFK quotes?

nikklg [1K]

"Every accomplishment starts with the decision to try." "As we express our gratitude, we must never forget that the highest form of appreciation is not to utter words, but to live by them." "Those who dare to fail miserably can achieve greatly." "The ignorance of one voter in a democracy impairs the security of all."

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3 years ago