Which of the following statements is NOT true about neutron stars?

a. They resist collapse with a pressure that stems from the Pauli exclusion principle.
b. If the mass of the neutron star is more than 3 solar masses, it can continue to collapse and become a black hole.
c. Some of the neutrons inside were formed from an electron-proton interaction.
d. Neutron stars are believed to be the explanation for pulsars.
e. The formation of neutron stars is a process known to absorb neutrinos.

e.
This statement is not true. Neutron stars are not necessarily known to absorb neutrinos, the light, non-charged particles produced in some nuclear reactions. Instead, they are known to emit neutrinos as electrons and protons fuse to form neutrons and an electron neutrino.

Physics & Space Science

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Electromagnetic waves are generated whenever the ____

a. motion of any particle is changed
b. motion of any charged particle changes
c. motion of a positively charged particle is changed
d. motion of a negatively charged particle is changed
e. acceleration of any charged particle is changed

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Both sound and light can travel in

A) a vacuum. B) water. C) both of these D) none of the above

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A soccer ball (mass = 0.43 kg) is moving at a speed of 20 m/s when it is kicked with a force of 300 N resulting in it going in the opposite direction with the same speed as before. What is the magnitude of the impulse delivered to the ball?

a. 0, because the before and after momenta cancel each other. b. 8.6 kg•m/s c. 17 kg•m/s d. 2600 kg•m/s

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Physics & Space Science

Each choice below lists a spectral type and luminosity class for a star. Which one is a red supergiant?

A) spectral type M1, luminosity class V B) spectral type O9, luminosity class I C) spectral type G2, luminosity class V D) spectral type M2, luminosity class I

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Physics & Space Science