Based on current understanding, the minimum mass of a black hole that forms during a massive star supernova is roughly ________

A) 3 solar masses B) 10 solar masses C) 1.4 solar masses D) 0.5 solar masses


A

Physics & Space Science

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A rotating flywheel can be used as a method to store energy. If it is required that such a device be able to store up to a maximum of 2.00 × 10^6 J when rotating at 400 rad/s, what moment of inertia is required?

a. 50 kgm2 c. 12.5 kgm2 b. 25 kgm2 d. 6.3 kgm2

Physics & Space Science

The radioactive isotope 131I (atomic number 53 ) decays to the isotope 131Xe (atomic number 54). What type of radioactive decay is this?

A) electron capture B) electron ionization C) beta decay D) alpha decay

Physics & Space Science

A quasar is a strong X-ray pulsar that emits radiation at set time intervals.

Answer the following statement true (T) or false (F)

Physics & Space Science

Which of the following is the symbol for an alkali metal?

a. Al b. Cl c. K d. Ca

Physics & Space Science