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3 years ago

How do stars go through fusion and why is hydrogen the element that goes through fusion?

1 answer:

6 0

Stars have large amounts of hydrogen and its the lightest element and requires the least energy to fuse then it becomes helium then carbon and oxygen then sodium neon and magnesium then silicon sulfur and phosphorus and finally iron and nickel which are the heaviest elements that can be made via fusion

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How is lithium fluoride and lithium chloride similar?

Blababa [14]

Answer:

Although odorless, lithium fluoride has a bitter-saline taste. Its structure is analogous to that of sodium chloride, but it is much less soluble in water. It is mainly used as a component of molten salts.

Explanation:

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3 years ago

1. According to Newton's Second Law of Motion, a net force of an object will cause it to accelerate. How does the Newton's law r

Galina-37 [17]

The gravitational field strength creates forces on mass by pulling it towards the centre the equation is weight=mass*gravitational field strength

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3 years ago

A toy rocket is launched straight up by using a spring. The rocket is initially pressed down on the spring so that the spring is

Delvig [45]

Answer:

B.6.86 m

Explanation:

Given that

Compression in spring ,x= 9 cm

Spring constant ,K= 830 N/m

Mass of the rocket ,m= 50 g = 0.05 kg ( 1 kg = 1000 g)

Now by applying energy conservation

$\dfrac{1}{2}Kx^2=mgh$

$h=\dfrac{1}{2\times mg}kx^2$

Now by putting the values ( we are taking g= 9.81 m/s²)

$h=\dfrac{1}{2\times 9.81\times 0.05}\times 830\times 0.09^2$

h= 6.853 m

Therefore the answer is B.

B.6.86 m

8 0

3 years ago

A real sample communication

leva [86]

Answer: english.

Explanation:

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3 years ago

Which are examples of convection currents ? Select three options.

Veseljchak [2.6K]

<u>Answer</u>:

(B) A pot being heated by an electric burner

(D) A radiator that emits warm air and draws in cool air

(E) A hot air balloon rising and falling in the atmosphere

These are some of the examples of the convection currents.

<u>Explanation</u>:

Earlier, electrons were believed to have positive charges and then electric current were discovered. But later after the invention of electric current and current which is termed to be the flow of electrons and is usually flows from negative to positive terminal. But its convention is not discarded in which current moves from positive terminal to negative and it is called convention current. The direction of current shown in the circuit is said to be the convention current.

Hence, the following are the examples of convention current.

1. Boiling water - The energy travels into the pot from the burner, boiling down the water. Then this warm water is accumulating on the top and colder one is heading down to absorb it, triggering a circular motion.

2. Radiator - Place hot air at the peak and pull cool air at the bottom.

3. Hot air balloon - The air is warmed up by a heating element within the balloon, so the air jumps upwards. This induces the balloon to increase in size due to the inside trapping of the warm air. He removes a few of the warm air when the pilot commences to dive, and cold air takes place, enabling the parachute to drop.

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3 years ago

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