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
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A quasar is a strong X-ray pulsar that emits radiation at set time intervals.
Answer the following statement true (T) or false (F)
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
Which of the following is the symbol for an alkali metal?
a. Al b. Cl c. K d. Ca
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