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3 years ago

Which statement describes the formation of our sun?

Physics

2 answers:

GaryK [48]3 years ago

8 0

Answer:

B) HEAT AND GASES CONTRACTED WITHIN A NEBULA

Explanation:

1) just got it right on my flvs test and 2) This dying star exploded, sending its outer gases in a butterfly shape away from its core. It's called the Butterfly Nebula, and it lies about 3,800 light years away from Earth in the constellation Scorpius. Over time, it will become the birthplace for new stars

:-)

byeeeeeee -k

Leya [2.2K]3 years ago

3 0

Heat and gases contracted within a nebula.
is correct statement .

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The speed of an arrow fired from a compound

san4es73 [151]

Answer:

A.) The arrow`s range is 624,996 m

B.) The arrow`s range is 846.887 m, when the horse is galloping

Explanation:

We have a case of oblique movement. In these cases the movement in the X axis is a Uniform Rectelinear Movement (URM), and a Uniform Accelerated Movement (UAM) in the Y axis.

By the way, the equations that we use for the X axis will be from URM, and those for the Y axis wiil be from UAM.

<u>Equations</u>

X axis:

$X=v_{ox}*t$

$v_{0x} =v_0cos(\alpha)$

Y axis:

$Y= Y_0 +v_{y0} t - \frac{g}{2} t^2$

A.) First, it is necessary to know t, total time.

To figure out t value, we use UAM, since time is determined by this movement.

Now, at the end of the movement, $Y=0$ , then

$0= Y_0 +v_{y0} t - \frac{g}{2} t^2$

$0=2.4m+79m/s*sin(39)t-(1/2*9.81m/s^2)t^2$

Caculate the segcond degree equation to obtain the two possible values for t:

$t_1= 10.18 \\t_2= -0.04046$

But, in physics, time it could not be negative, so we take $t_1= 10.18$

Caculate now:

$X=79m/s*cos(\39)*10.18s= 624.996 m$

B.) Now, the narrow has an additional speed, that could be sum to the speed due to the bow.

$v_0= 79m/s+13m/s= 92m/s$

Using the same procedure that item A, caculate X

First, we need to know the new time

$0=2.4m+92m/s*sin(39)t-(1/2*9.81m/s^2)t^2$

And we obtain:

$t_1=11.845s\\t_2=-0.041s$

One more time, we take the positive time: $t_1=11.845s$

Finally:

$X=92m/s *cos(39)*11.845s=846.887 m$

6 0

3 years ago

How much heat is needed to raise the temperature of 1 kg of iron from 25 degree to 30 degrees?

stiv31 [10]

Answer:300 joules

Explanation:The formula for specific heat is:

, where:

is the energy needed in joules,

is the mass in kilograms,

is the specific heat,

is the change in temperature, Celsius of Kelvin doesn't matter.

Here,

0.125

480

J/kg

∘

, and inputting:

0.125

⋅

480

⋅

300

of energy is needed.

4 0

4 years ago

Which are characteristics of concave mirrors? Check all that apply.

aalyn [17]

Answer:

the answers are 1 2 and 5!

5 0

4 years ago

On December 26, 2004, a violent earthquake of magnitude 9.1 occurred off the coast of Sumatra. This quake triggered a huge tsuna

Sonja [21]

Answer:

a) 800 km

b) 9.79° & 12.47°

Explanation:

It is known that the wavelength of any material or substance is given by the relation 入 = v/f

From the question, the time between the crest is given as 1.0 h, therefore, t = 1.0 h

Also, remember that frequency, f can be represented by

f = 1/t, and thus,

f = 1/1.0 h = 1.0 h^-1. This is our frequency, and would be used in the primary stated formula

入 = v/f, from the question, the speed is already stated as 800 km/h, so we apply directly

入 = 800 / 1

入 = 800 km. Therefore, the wavelength of the tsunami is 800 km

the smallest angle between the Southern tip of Africa is

Sinθ = 800 / 4500

Sinθ = 0.17

θ = Sin^-1 0.17

θ = 9.79°

The smallest angle between the Southern end of Australia is

Sinθ = 800 / 3700

Sinθ = 0.216

θ = Sin^-1 0.216

θ = 12.47°

4 0

4 years ago

What other theory does the author compare to the Big Bang to?

sveta [45]

Answer:

The two Russian authors based their exposition on what they called the Friedmann theory of a singular beginning of the universe, referring throughout to the “theory of the hot universe” as an alternative to the hot Big Bang theory.

7 0

3 years ago