Which statement is true about white dwarf?
a. they are made of neutrons
b. they are made of mostly carbon
c. they are very dense and small in size (about the size of the earth)
d. they will eventually turn into black holes

C is the correct answer

White dwarf are very dense and small in size is a true statement.

Option C

Explanation:

A white dwarf also known as degenerate dwarf.  The white dwarf "mass is comparable to the Sun" and its "volume is comparable to Earth".

The white dwarf is a stellar whose size is near to the size of the earth. It had a gravitational collapse. The diameter of the white dwarf is just one percent of the Sun. It is extremely dense where there is no free space between the atoms.

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27