Question

A star such as the Sun starts out as a protostar with a diameter a hundred times larger than its diameter during its main-sequence lifetime. Accordingly, the protostar's temperature is much less than its main-sequence temperature. Assume that while the Sun was a protostar it had a diameter 95.00 times that of the present-day Sun. How many times greater was the protostar's surface area

Answer 1

The protostar's surface area was 1.1  times greater.

Surface area of the star

The surface of the star can be assumed be circular and the surface area can determined as follows;

• initial diameter = 100d
• final diameter = 95d

Area = πr²

$Area = \frac{\pi d^2}{4} \\\\Area = \frac{(100d)^2}{(95d)^2}$

Surface area = 1.1 times greater

Thus, the protostar's surface area was 1.1  times greater.

Learn more about protostars here:  brainly.com/question/891408