The Sun and most stars are made almost entirely of a. hydrogen and carbon. b. helium and nitrogen. c. oxygen and nitrogen. d. helium and hydrogen.

Answers

Answer 1

Answer: So the question is what are the Sun and most stars almost entirely made of. So most stars, including our Sun are made out of hydrogen and helium. There is also a small percentage of oxygen, carbon and nitrogen and also very small quantities of iron, silicone and other metals. So the correct answer is d.

Related Questions

Calculate the accleration of a 25-Kg object that moved with force of 300 N
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Air flowing from the equator to the poles rises and falls in looping patterns. What are these patterns called?A. The Coriolis Effect
B. Convection Cells
C. Emanation Cells
D. Radiation

Answers

These patterns are called

B. Convection Cells

What are Convection Cells?

The equatorial region receives the maximum amount of sunlight as the sun is directly above it. Due to this, the earth experiences a higher temperature, as a result of which the air in this region becomes warm and less dense. It then slowly rises up towards the upper atmosphere, forming a low pressure zone. This air when rises up, slowly cools, and after sometime it falls back. This continuous motion of air mass creates convection cells in the atmosphere.

Thus, the correct answer is option (B).

Find more information about Convection cells here:

brainly.com/question/1024190

The correct answer for the given question above would be option B. Air flowing from the equator to the poles rises and falls in looping patterns and these patterns are called convection cells. Convection cells is an important process in the formation of landforms and the movement of winds. Hope this answers your question.

What affect does doubling the net force have on the acceleration of the object (whenthe mass of the object stays the same)? Identify a set of two trials that support your answer to question 1

Answers

Answer: The acceleration doubles

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Explanation:

Consider a mass of 10 kg, so m = 10

Let's say we apply a net force of 20 newtons, so F = 20

The acceleration 'a' is...

F = ma

20 = 10a

20/10 = a

2 = a

a = 2

The acceleration is 2 m/s^2. Every second, the velocity increases by 10 m/s.

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Now let's double the net force on the object

F = 20 goes to F = 40

m = 10 stays the same

F = ma

40 = 10a

10a = 40

a = 40/10

a = 4

The acceleration has also doubled since earlier it was a = 2, but now it's a = 4.

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In summary, if you double the net force applied to the object, then the acceleration doubles as well.

Acceleration is directly proportional to the net force on an object, and inversely proportional to its mass.

So if an object's mass stays the same while the net force on it doubles, then its acceleration will also double.

We don't know anything about the "trials". This sounds like it might be a follow-up to a lab experiment that was performed when we weren't there.

We also don't know anything about "question 1".

What type of reaction is shown below? Ba(OH)2 + 8H20 + 2NH4NO3 + heat ?10H2O + 2NH3 + Ba(NO3)2

Answers

Double Displacement Reaction

An element from each of two compounds switch places.
Example: compound + compound ⇒ compound + compound

Chemical reactions are processes in which substances change into other substances. A chemical reaction takes place if one or more of these occur:
Color changes - Different combinations of molecules reflect light differently. A color change indicates a change in molecules.
Heat content changes- In all chemical reactions, the heat content of the reactants and the heat content of the products is never the same. Sometimes the difference is great and can be easily detected. At other times, the difference is slight and more difficult to detect.
Gas produced - Whenever a gaseous product forms in a liquid solution, bubbles can be seen. A colorless gas produced in a reaction of solids is much harder to detect.
Precipitate forms- Precipitates are insoluble products formed by a reaction taking place in a liquid solution. This insoluble product will eventually settle to the bottom, but might immediately appear by turning the clear solution cloudy.

Answer:

Endothermic.

Explanation:

I took the same test and this was the correct answer.

I hope this helps you!

You begin sliding down a 15∘ ski slope. part a ignoring friction and air resistance, how fast will you be moving after 10 s?

Answers

Answer:

25 m/s

Explanation:

This is a uniformly accelerated motion, so the velocity at time time is given by

$v(t) = v_0 +at$

where $v_0$ is the initial velocity and a is the acceleration.

In this problem, the initial velocity is zero: v0=0. The acceleration is the component of the gravitational acceleration projected along the direction of motion, so

$a=g sin \theta = (9.8 m/s^2) sin 15^(\circ)=2.5 m/s^2$

Therefore, the velocity after t=10 s will be

$v(10 s)=at=(2.5 m/s^2)(10 s)=25 m/s$

Final answer:

Ignoring friction and air resistance, a skier moving down a 15-degree slope with an acceleration of 2.1 m/s² will be traveling at a speed of 21 m/s after 10 seconds.

Explanation:

This question is asking about the speed of a skier sliding down a 15-degree ski slope under the influence of acceleration due to gravity, ignoring friction and air resistance. Given the acceleration of the skier is 2.1 m/s², we can use the equation of motion to find the velocity after a certain time (10 seconds).

This equation is v = u + at, where u is the initial velocity (which is 0 m/s as the skier starts from rest), a is the acceleration (2.1 m/s²), and t is time in seconds (10 seconds). So, v = 0 + 2.1 * 10 = 21m/s.

Therefore, ignoring friction and air resistance, the skier will be moving at a speed of 21 m/s after 10 seconds down the 15-degree ski slope.

Learn more about Physics of Skiing here:

brainly.com/question/10595258

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Determine the acceleration of the moon, which completes a nearly circular orbit of 384.4 mm radius in 27.3 days.

Answers

Answer: 2.72\cdot 10^{-3} m/s^2

Explanation:

I took the quiz

An electric fence displays a warning sign about voltage and amperage of the fence. How would amperage and voltage affect the power of the fence?

Answers

Yes it is true that electrical fences displays a warning about voltage and amperage of the fence. It has to be first understood that power is directly proportional to voltage as well as current. So higher the voltage or higher the current flowing through the fenses, higher will be the power. So any person touching the fence should always be aware of the voltage and current flowing through the fence, otherwise it can be very deadly. Sometimes it can be seen that a high voltage is being passed through the fence and the current passed is comparitively low. This will not decrease the total power flowing through the fence.

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The mass of a stroller and the child it carries is 23.7 kg. A man pushes the stroller with a force of 142 N at an angle of 38.0° to the vertical. The stroller experiences a friction force of 24.0 N due to the brake accidentally being on. What is the stroller's acceleration forward?A. 5.99 m/s2 B. 3.90 m/s2 C. 2.68 m/s2 D. 4.98 m/s2