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3 years ago

_____ describes the life cycle of a star. nuclear fusion nebular clouds stellar evolution the big bang

Physics

2 answers:

EleoNora [17]3 years ago

6 0

Stellar Evolution is the answer! :)

Anastasy [175]3 years ago

5 0

Answer:

Stellar evolution

Explanation:

Nuclear fusion is the process that goes inside a star which powers the star.

Nebular clouds are just clouds of dust (mostly hydrogen and helium) from which a star is born.

Stellar evolution describes the various stages in the life of a star.

The big bang describes how the universe as we know it actually is created. It says universe is created by the explosion of the tiny and highly dense singularity .

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2 years ago

Suppose an automobile has 2000-joules of kinetic energy. when it moves at twice the speed, what will be its kinetic energy? what

NeX [460]

Answer:

K.Eₓ = 4 K.E

K.Eₓ = 9 K.E

Explanation:

Th formula for the kinetic energy of a body is given as follows:

$K.E = \frac{1}{2}mv^2\\$ ---------------equation (1)

where,

K.E = Kinetic Energy of Automobile

m = mass of automobile

v = speed of automobile

For twice speed:

vₓ = 2v

then,

$K.E_{x} = \frac{1}{2}mv_{x}^2\\K.E_{x} = \frac{1}{2}m(2v)^2\\K.E_{x} = 4\frac{1}{2}mv^2\\$

using equation (1):

For thrice speed:

vₓ = 3v

then,

$K.E_{x} = \frac{1}{2}mv_{x}^2\\K.E_{x} = \frac{1}{2}m(3v)^2\\K.E_{x} = 9\frac{1}{2}mv^2\\$

using equation (1):

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3 years ago

What is the mass if an object moving with a speed of 9m/s and a kinetic energy if 2000 J

stepladder [879]

Solve for mass:

m= 2k/v(squared)

m=2000(2)/9(squared))

m=49.383 kilograms

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3 years ago

Ask Questions Action and reaction force pairs are all around you, but they aren't always obvious. Write down

NARA [144]

Answer:

Writing with a pencil. The pencil pushes on the paper. The paper pushes on the pencil.

Explanation:

Newton's third law.

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