Question

] Accreting, spinning, magnetized systems tend to:

1. Accelerate
2. Grow in mass
3. Produce jets
4. Produce supernovae
5. Cannot be predicted

[28] If space had been found to be negatively curved, the other evidence might have us conclude that:

1. The universe will re-collapse
2. The need for dark energy is even greater
3. There might be little or no dark energy
4. Omega =1 exactly
5. None of the above

[29] The “anthropic principle” addresses the idea that:

1. The universe seems conducive to life
2. The universe is homogeneous everywhere
3. The universe can be explained via rational explanations
4. The study of cosmology is common to all human cultures
5. None of the above

30. The “principle of equivalence” states that:
    1. Masses of fundamental particles are the same everywhere
    2. All universes in a multiverse are similar  
    3. Acceleration in a gravitational field in similar to the acceleration by a rocket D) Mass and energy are equivalent (E = mc²)

31. Type Ia supernovae are:
    1. Exploding neutron stars
    2. Exploding hydrogen rich white dwarf stars
    3. Exploding helium / carbon white dwarf stars
    4. Exploding massive stars stripped of their hydrogen envelopes
    5. Exploding hydrogen-rich massive stars

Answer 1

1)Accreting, spinning, magnetized systems tend to

Ans.C)Produce Jets

28) If Space has been found to be negatively curved, the other evidence might have us conclude that;

Ans. C) There might be little or no dark energy.

For negative curvature omega <1. Negative curvature universe do not need dark energy for expansion.

29) The " Anthropic Principle Addresses the idea that

Ans. A) The universe seems conducive to life.

It is a phillosphical concept which relates the observation of the universe to the observers(humans).

The Principle of Equivalence states that

Ans.C.) Acceleration in a gravitaional field is similar to acceleration by a rocket.

The Principle of Equivalence of GR, related the accelration of a body on earth under its gravtaional field to acceleration in a spaceship being accelrated using its engines.

Type Ia Superovas are

Ans C.) Exploding Helium Carbon/White Dwarf Stars.

They are observed in binnary systems where one of the compaions is a White Dwarf.