The death of a star occurs when its _____ stops.nuclear fusion
nebular clouds
stellar gravity
rotation

Answers

Answer 1

Answer: Nuclear fusion
Stars fuse hydrogen into helium (and depending, also carbon, oxygen, neon, magnesium, silicon, and iron but that's complicated) to resist the force of immense gravity, in order to retain its shape.

Answer 2

Answer:

the answer is: Nuclear fusion

Related Questions

In a ballistic pendulum experiment, projectile 1 results in a maximum height h of the pendulum equal to 2.6 cm. A second projectile (of the same mass) causes the the pendulum to swing twice as high, h2 = 5.2 cm.The second projectile was how many times faster than the first?
You step off of a ledge and land 0.5 seconds later. How high was the ledge?
A 1200-nF capacitor with circular parallel plates 2.0 cm in diameter is accumulating charge at the rate of 35 mC/s at some instant in time. (A) What will be the magnitude of the induced magnetic field 10.0 cm radially outward from the center of the plates?
A substance has a melting point of 0 degrees celsius and a boiling point of 100 degrees celsius. The substance is most likelya. water b. hydrogen c. gold d. table salt
A force of 450 N accelerates a box across a frictionless surface at a rate of 15 m/s2. What is the mass of the box? 30 N 30 kg 6,750 N 6,750 kg

A stone thrown from a height of 5.72 meters hits the ground at 13.3, Calculate the initial speed. Neglect air resistance

Answers

Answer:

12.31618 m/s

Explanation:

s = Displacement

t = Time taken

g = Acceleration due to gravity = 9.81 m/s² = a

$s=ut+(1)/(2)at^2\n\Rightarrow 5.72=0t+(1)/(2)* 9.81* t^2\n\Rightarrow t=\sqrt{(5.72* 2)/(9.81)}\n\Rightarrow t=1.07988\ s$

Velocity is given by

$v=(s)/(t)\n\Rightarrow v=(13.3)/(1.07988)\n\Rightarrow v=12.31618\ m/s$

The initial velocity is 12.31618 m/s

Assume that all four H-R diagrams below represent a star in different stages of its life, after it starts to fuse hydrogen in its core. Rank the HR diagrams based on when each stage occurs, from first to last.

Answers

Answer and explanation;

-The diagram at the left represents the Sun (or any other one-solar-mass star) as a hydrogen-burning main-sequence star, with spectral type G and one solar luminosity. The next diagram shows the Sun after it has exhausted its core hydrogen and left the main sequence, making it a sub-giant with energy generated by hydrogen burning in a shell around an inert helium core.

-The third diagram shows the Sun a little later; its energy source is still hydrogen shell burning, but at this point it has expanded in size so much that it is a red giant. The final diagram (far right) shows the white dwarf corpse of a one-solar-mass star; it is hot because it is the exposed core of the dead star, but dim because it is small in size.

The right answer for the question that is being asked and shown above is that: "1-4-3-2." (main sequence-->red giant-->supergiant-->white dwarf). Assume that all four H-R diagrams below represent a star in different stages of its life, after it starts to fuse hydrogen in its core.

If a grocery cart with a mass of 16.5 kg accelerates at +2.31 m/s2 against a frictional force of -15.0 N, what is the applied force?

Answers

Call the applied force 'A'. (Clever ?)

The forces on the cart are 'A' forward and 15 N backward.

The net force on the art is (A-15) forward.

F = m a

Net forward force = (mass of the cart) x (its forward acceleration)

(A - 15) = (16.5) x (2.31)

A - 15 = 38.115

Add 15 to each side:

A = 53.115 newtons

2th Law of Newton:

$\vec{R}=m.a\n \n \vec{R}=\vec{F} -\vec{F_a}=m.a\n \n \vec{F}-15=16.5*2.31\n \n \vec{F}=38.115+15\n \n \boxed{\vec{F}=53.115 \ N}$

During Mr. Nye's science class, students were expected to identify various substances using physical properties they could easily measure. Mr. Nye gave each of the five groups a green, metal cube. The students had to identify what metal the cube was made of. The length of each side was 3.0 cm and the mass was 270 grams. What property should Mr. Nye's science students use to identify the metal in the cubes?

A) color

B) density

C) mass

D) volume

Answers

Density is the best property to use, as while multiple different metals could create cubes with the same color, mass, or volume, no different metal could create a cube with the same mass and volume. Density is based on mass and volume, and as a result no two different metals will have the same density.

Hey there

The students should use density.

Walking across a carpet is an example of charge being transferred bya. contact.
b. induction.
c. static electricity.
d. friction.

Answers

Answer : The correct answer is- D) Friction.

There are three modes of charging, which are Conduction, induction, and friction.

The static electricity is produced due to the rubbing of one substance with another. This is called charing by friction.

Hence, the correct answer is friction as there is friction between carpet and the feet of person walking over it.

Walking across a carpet is an example of charge being transferred by friction. The answer is letter D. The carpet, which is at rest, will resist the motion cause by your walking. This resistive motion d the friction the carpet obtained from you and you from the carpet.

What is the mass of 2.5 mol of Ca, which has a molar mass of 40 g/mol?