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3 years ago

Why is it important to study solar flares?

1 answer:

6 0

In my opinion, solar flares are really cool to learn about because they are created by radiation from the sun and sun spots. Since solar flares happen in atmosphere, scientists learn about them and classify them in an interesting way. They do it by there strength so there are many different types. They are also many different colors you can find to. Hope this helped.

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A crate resting on a horizontal floor (\muμs = 0.61, \muμk = 0.3 ) has a horizontal force F = 49 Newtons applied to the right. T

Darya [45]

Answer:

a = 7.80 m/s²

Explanation:

given,

μs = 0.61

μk = 0.3

F = 49 N

we know,

F = μs m g

$m = \dfrac{F}{\mu_s\ g}$

$m = \dfrac{49}{0.61 \times 9.81}$

$m = 8.19\ kg$

now when the block start moving

$F - F_k = F_{net}$

$F - F_k = ma$

$a = \dfrac{F}{m}-\dfrac{F_k}{m}$

$a = \dfrac{F}{m}-\dfrac{\mu_k m g}{m}$

$a = \dfrac{88}{8.19}-0.3\times 9.8$

a = 7.80 m/s²

3 0

4 years ago

The "Garbage Project" at the University of Arizona reports that the amount of paper discarded by households per week is normally

Lorico [155]

Answer:

54%

Explanation:

We are given that

S.D=4.2 lb

Mean= $\mu=9.4 lb$

We have to find the percentage of household throw out at least 9 lb of paper a week.

Normal distribution formula :

$P(X\geq a)=P(z\geq \frac{a-\mu}{\sigma})$

We have a=9

$P(X\geq 9)=P(z\geq \frac{9-9.4}{4.2})=P(z\geq -0.1)$

$P(X\geq 9)=1-P(z$

$P(X\geq 9)=1-0.4602=0.5398\times 100=54$ %

Hence, the percentage of household throw out at least of paper a week=54%

7 0

3 years ago

A thin-walled vessel of volume V contains N particles which slowly leak out of a small hole of area A. No particles enter the vo

LuckyWell [14K]

Answer:

$\frac{V}{2av}$

Explanation:

From the question we are told that

Volume V

Contains N particles

Leaks from a small hole of area A

Generally the equation for Flow rate is given as

Volume Flow Rate $V_r = A * v$

Mathematically we find the time taken to flow half way which is given by

$\frac{(V/2)}{A*v}$

Therefore the time taken is

$\frac{V}{2av}$

7 0

3 years ago

A sailboat moves north for a distance of 10.00 km when blown by a wind from the eaxct southeast with a force of 5.00 X 10^4 N. H

Irina-Kira [14]

Answer:

A sailboat moves north for a distance of 10.00 km when blown by a wind from the eaxct southeast with a force of 5.00 X 10^4 N. How much work was done by the wind?

Explanation:

5 0

3 years ago

A metal ball has a mass of 2kg and a volume of 6 m3. What is its density

Lena [83]

Answer: The answer is 333.3333 repeating

Explanation:

Divide the mass by the volume.

8 0

3 years ago

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