Escape speed for a rocket is less from

A) Earth.
B) the Moon.
C) the Sun.
D) same for each


Answer: B

Physics & Space Science

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Capacitors of values 1.0 F, 2.0 F, 3.0 F, and 6.0 F are connected in series across a 12 V power supply. Which capacitor has the greatest potential difference across it?

A. the 1.0 F capacitor B. the 2.0 F capacitor C. the 3.0 F capacitor D. the 6.0 F capacitor E. they all are equal

Physics & Space Science

The difficulty of taking a photograph of an atom with light is

A) unwanted diffraction. B) that atoms are smaller than wavelengths of light. C) both of these D) neither of these

Physics & Space Science

The figure shows a cross section of three parallel wires each carrying a current of 5.0 A out of the paper. If the distance R = 6.0 mm, what is the magnitude of the magnetic force on a 2.0-m length of any one of the wires?



a.
2.5 mN

b.
3.3 mN

c.
2.2 mN

d.
2.9 mN

e.
1.7 mN

Physics & Space Science

What is the unusual result of mass transfer in the Algol binary system?

A) a helium white dwarf B) a carbon white dwarf C) a black dwarf D) a red dwarf E) a brown dwarf

Physics & Space Science