A hydrogen atom consists of an electron and a(n)
A) proton.
B) ion.
C) neutrino.
D) neutron.
E) lepton.
A
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If the distance to the moon were halved, then the force of attraction between the earth and moon would be
A. quartered. B. halved. C. doubled. D. quadrupled.
An air-filled capacitor is formed from two long conducting cylindrical shells that are coaxial and have radii of 13 mm and 85 mm
The electric potential of the inner conductor with respect to the outer conductor is -600 V. (k = 1/4??0 = 8.99 × 109 N • m2/C2 ) The maximum energy density of the capacitor is closest to A) 2.7 × 10-3 J/m3. B) 1.3 × 10-3 J/m3. C) 6.7 × 10-4 J/m3. D) 3.4 × 10-3 J/m3. E) 1.7 × 10-4 J/m3.
The pattern of rising hot gas cells all over the photosphere is called
A) filaments. B) granulation. C) sunspots. D) convective projections. E) prominences.
An object travels 7.5 m/s toward the West and under the influence of a constant net force of 5.2 kN, it comes to rest in 3.2 s. What is its mass?
A. 1600 kg B. 12000 kg C. 1100 kg D. 690 kg