The age of our solar system is approximately

A) 10,000 years.
B) 3.8 million years.
C) 4.6 million years.
D) 4.6 billion years.
E) 14 billion years.


D

Physics & Space Science

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Ekapluto is an unknown planet that has two spherical moons in circular orbits. The table summarizes the hypothetical data about the moons. Both moons have low axial spin rates. (G = 6.67 × 10-11 N ? m2/kg2)

Mass Radius Orbital radius Orbital period Moon A 4.0 × 1020 kg 2.0 × 108 m 4.0 × 106 s Moon B 1.5 × 1020 kg 2.0 × 105 m 3.0 × 108 m The acceleration due to gravity at the surface of Moon B is A) 0.10 m/s2. B) 0.15 m/s2. C) 0.20 m/s2. D) 0.25 m/s2. E) 0.30 m/s2.

Physics & Space Science

Explain how radioactive dating works, and why it works only with igneous rocks

What will be an ideal response?

Physics & Space Science

A Type II supernova can form a _______________ or a black hole

a. neutron star b. red giant c. white dwarf d. planet

Physics & Space Science

Four long wires are perpendicular to the x-y plane. Each wire carries the same magnitude current. Wire 1 goes through point (a, a, 0) on the x-y plane, wire 2 goes through the point (–a, a, 0), wire 3 goes through the point (–a, –a, 0), and wire 4 goes through the point (a, –a, 0). Wires 1 and 3 carry their currents in the positive z direction and wires 2 and 4 carry their currents in the

–z direction. What is the direction of the resulting magnetic field at the origin? a. in the +x direction b. in the –y direction c. in the –x direction d. There is no direction since the field is zero at this point.

Physics & Space Science