The stability of a neutron star is expected only if a neutron star is a ____________
a. solid b. fluid
c. gas d. All of the other choices are correct.
b
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The center of the Milky Way galaxy must be less than 1 AU in diameter and contain at least 4 million solar masses. Therefore, the center of the Milky Way galaxy must be a ____________________,
Fill in the blank(s) with correct word
Three resistors, 10 ?, 20 ?, and 30 ?, are wired in series and connected to a 120-V battery. How much current flows in the circuit?
An electron of mass 9.11 × 10^-31 kg moves with a speed of 0.800c. What is its total energy? (c = 3.00 × 10^8 m/s)
a. 13.7 × 10^-14 J c. 4.80 × 10^-14 J b. 10.2 × 10^-14 J d. 7.30 × 10^-14 J
Air at 30°C and 200 kPa is flowing in a 30-cm-diameter pipe and passes through the bend shown. An estimate of the pressure difference between the inside of the bend and the outside of the bend is approximately:
(A) 110 Pa
(B) 140 Pa
(C) 180 Pa
(D) 240 Pa