Which of these evolutionary paths is the fate of our Sun?

A) nova
B) supernova of Type II
C) planetary nebula
D) supernova of Type I
E) brown dwarf


C

Physics & Space Science

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How might two colliding spiral galaxies tend to create an elliptical galaxy?

A) The orbits of the stars get randomized during the collision, while their gas disks collide and form stars. B) The collision creates a larger galaxy and elliptical galaxies are always larger. C) The gas in the disks of the galaxies is expelled into intergalactic space by gravitational interactions. D) The heat created by collisions between stars causes the disks to puff out into a spherical shape.

Physics & Space Science

Express the result of the following calculation, to the proper number of significant figures: 8.4 + 4240

What will be an ideal response?

Physics & Space Science

What is the name for the following polyatomic ion?

PO4-3 A) phosphate B) phosphorus oxide C) phosphinate D) trioxo phosphoride E) potassium

Physics & Space Science

A wheel (radius = 12 cm) is mounted on a frictionless, horizontal axle that is perpendicular to the wheel and passes through the center of mass of the wheel. A light cord wrapped around the wheel supports a 0.40-kg object. If released from rest with the string taut, the object is observed to fall with a downward acceleration of 3.0 m/s2 . What is the moment of inertia (of the wheel) about the

given axle? a. 0.023 kg/m2 b. 0.013 kg/m2 c. 0.020 kg/m2 d. 0.016 kg/m2 e. 0.035 kg/m2

Physics & Space Science