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3 years ago

Suppose the universe contained only low-mass stars. Would elements heavier than carbon exist?

Physics

1 answer:

xz_007 [3.2K]3 years ago

4 0

Answer:

No, since they don't have the necessary mass and a high temperature in their core.

Explanation:

There are two forces that play an important role in the stars: the force of gravity in the inward direction due to stars' own mass and the radiation pressure in the upward direction as a consequence of the nuclear reaction in their core.

The superficial layers of the stars compress the core as an effect of their own gravity. Therefore, atoms will be closer to each other in the core, allowing them to combine, increasing the density and temperature.

A nuclear reaction occurs when light elements combine into heavier elements (that is known as nucleosynthesis). To get fusion reactions that generate heavier elements than carbon high temperature is necessary, which can be gotten by a more massive star for what was already explained in the first paragraph.

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Basalt is pushed into the crust by subduction. It will most likely become _____.

suter [353]

Subduction is, "<span>the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate." The basalt would most likely be swallowed up into the ground.
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3 years ago

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lutik1710 [3]

Answer:

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2 years ago

Two technicians are discussing testing MAP sensors. Technician A says that the MAP sensor should be replaced if anything comes o

irinina [24]

The statements from both Technicians A and B are correct.

Answer: Option C

<u>Explanation:</u>

A typical MAP sensors comprises with a ceramic or silicon wafers, sealed with an ideal vacuum on one side and a suction manifold on the other. When the engine (motor) vacuum varies, the differential pressure across the board changes the output voltage or frequency to the MAP sensor. So, sensor vacuum to be increased if injection pulse widths increase.

Most pressure sensors operate at 5 volts from a computer and return a signal (voltage or frequency) based on the pressure applied to the sensor (vacuum). When testing the MAP sensor, make sure that the vacuum hose and hose connections are tightly connected to the engine vacuum source. According to this, concluding that the statements from both technicians are correct.

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4 years ago

Which term describes what a british thermal unit measures?.

Yakvenalex [24]

Answer:

it is a measure of the heat content of fuels or energy sources

Explanation:

8 0

2 years ago

Determine the distance from the Earth's center to a point outside the Earth where the gravitational acceleration due to the Eart

Temka [501]

The distance from the Earth's center to the point outside the Earth is 55800 Km

<h3>How to determine the distance from the surface of the Earth</h3>

Acceleration due to gravity of Earth = 9.8 m/s²
Acceleration due to gravity of the poin (g) = 1/60 × 9.8 = 0.163 m/s²
Gravitational constant (G) = 6.67×10¯¹¹ Nm²/Kg²
Mass of the Earth (M) = 5.97×10²⁴ Kg
Distance from the surface of the Earth (r) =?

g = GM / r²

Cross multiply

GM = gr²

Divide both sides by g

r² = GM / g

Take the square root of both sides

r = √(GM / g)

r = √[(6.67×10¯¹¹ × 5.97×10²⁴) / 0.163)]

r = 4.94×10⁷ m

Divide by 1000 to express in Km

r = 4.94×10⁷ / 1000

r = 4.94×10⁴ Km

<h3>How to determine the distance from the center of the Earth</h3>

Distance from the surface of the Earth (r) = 4.94×10⁴ Km
Radius of the Earth (R) = 6400 Km
Distance from the centre of the Earth =?

Distance from the centre of the Earth = R + r

Distance from the centre of the Earth = 6400 + 4.94×10⁴

Distance from the centre of the Earth = 55800 Km

Learn more about gravitational force:

brainly.com/question/21500344

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5 0

2 years ago