The Crab Pulsar, Radius Is a Neutron Star

question 66

Multiple Choice

The Crab Pulsar, radius is a neutron star located in the Crab Nebula.The rotation of the Crab Pulsar is currently approximately 30 rotations per second,or 60 rad/s.The rotation rate of the star,however,is decreasing such that each year the rotation period increases by 10^-5 s.Estimate the amount of energy the pulsar looses each year.

• A)4 * 10³¹ J
• B)2 * 10³⁵ J
• C)1 * 10³⁹ J
• D)6 * 10⁴² J

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Definitions:

Menstrual Cycle

The regular natural change that occurs in the female reproductive system that makes pregnancy possible.

Estrogen

A group of hormone compounds mainly responsible for the development and regulation of female sex characteristics and reproductive functioning.

Testosterone

A primary male sex hormone that plays key roles in the development of male reproductive tissues, secondary sexual characteristics, and the regulation of libido.

Somatostatin

A hormone that inhibits the release of several other hormones, playing a critical role in the regulation of the digestive system and the maintenance of hormonal balance.