A certain spherical asteroid has a mass of 3.5 × 1016 kg and a radius of 8.8 km. What is the minimum speed needed to escape from the surface of this asteroid? (G = 6.67 × 10-11 N ? m2/kg2)

A) 23 m/s
B) 16 m/s
C) 520 m/s
D) 730 m/s


Answer: A

Physics & Space Science

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We construct a closed Gaussian surface in the shape of a spherical balloon. Assume that a small glass bead with total charge Q is in the vicinity of the balloon. Consider the following statements:

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1.Only A is valid. 2.Only B is valid. 3.Both A and B are valid. 4.Neither one is valid.

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If the total energy of an electron in an accelerator is five times its rest energy, what is its speed? (c = 3.00 × 10^8 m/s)

a. 1.98 × 10^8 m/s c. 2.32 × 10^8 m/s b. 2.94 × 10^8 m/s d. 2.90 × 10^8 m/s

Physics & Space Science

The first minerals to crystallize from a cooling magma have a

What will be an ideal response?

Physics & Space Science