Once Carbon Begins Burning in the Core of a High-Mass

question 51

Multiple Choice

Once carbon begins burning in the core of a high-mass star,the outer layers begin to fall inward,driving up the fusion rates and speeding up the star's evolution primarily because:

• A) the number of particles in the core is decreasing which now take up less space
• B) most of the energy is now carried away from the core by escaping neutrinos which have few if any obstacles to leaving the star
• C) carbon is a more stable element that appears to settle the star
• D) the light given off by the fusion of carbon is a different wavelength than given off by previous reactions so the radiation pressure is much smaller

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Definitions:

Sartorius

The longest muscle in the human body, running from the hip to the knee, and aiding in flexing, abduction, and lateral rotation of the thigh.

Biceps Femoris

A muscle of the thigh located at the back of the leg, part of the hamstrings group, involved in knee flexion and thigh extension.

Gastrocnemius

A major muscle located in the back part of the lower leg that helps in bending the knee and pushing the foot down, such as when walking or jumping.

Tibialis Anterior

A muscle in the lower leg that dorsiflexes and inverts the foot.