PLEASE HELP 1. Explain how UY Scuti and J0523 are different.

2. Why will J1311 (the Black Widow Pulsar) eventually find itself without its companion star? How will this happen?

3. How did scientists determine SM0313 is the oldest star ever discovered?

4. What characteristics of HV2112 make it the best candidate to be classified as a Thorne-Zytkow object?

1. How does a star's mass determine its lifespan?

2. Discuss the characteristics of cool red dwarf stars, including their mass and age.

3. Discuss the correlation or connection between stars with a higher mass and the amount of fuel they have to work with.

4. How old is the sun and since it's birth, how has the sun changed?

5. During its lifespan, what characteristics of the sun will change?

The density of a liquid could be found by using

Search coils and credit cards. one practical way to measure magnetic field strength uses a small, closely wound coil called a search coil. the coil is initially held with its plane perpendicular to a magnetic field. the coil is then either quickly rotated a quarter-turn about a diameter or quickly pulled out of the field. (a) derive the equation relating the total charge q that flows through a search coil to the magnetic-field magnitude b. the search coil has n turns, each with area a, and the flux through the coil is decreased from its initial maximum value to zero in a time ∆t. the resistance of the coil is r, and the total charge is q = i∆t, where i is the average current induced by the change in flux. (b) in a credit card reader, the magnetic strip on the back of a credit card is rapidly “swiped” past a coil within the reader. explain, using the same ideas that underlie the operation of a search coil, how the reader can decode the information stored in the pattern of magnetization on the strip. (c) is it necessary that the credit card be “swiped” through the reader at exactly the right speed? why or why not?

The necleus of an atom is made up of what subatomic particles?