The second postulate of special relativity is that:
a. The speed of light in a vacuum depends on the relative motion of the source and observer.
b. The speed of light in any medium is the same constant.
c. The speed of light is slower for a moving observer.
d. The speed of light in a vacuum is a constant independent of the speed of either the source or the observer.
e. The speed of light in a vacuum depends on its motion through the ether.
d
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If you add 900 kJ of heat to 900 g of water at 90.0°C, how much water is left in the container? The latent heat of vaporization of water is 22.6 × 105 J/kg
A) 518 g B) 258 g C) 340 g D) 600 g E) none
Thin Films: A puddle of water has a thin film of gasoline floating on it. A beam of light is shining perpendicular on the film. If the wavelength of light incident on the film is 560 nm and the indices of refraction of gasoline and water are 1.40 and 1.33, respectively, what must be the minimum thickness of the film to see a bright reflection?
A. 100 nm B. 200 nm C. 300 nm D. 400 nm E. 500 nm
Between the orbits of the planets Mars and Jupiter we find
A) the Oort cloud B) Orion's belt C) the Kuiper belt D) the asteroid belt
A particle (mass = 6.7 × 10?27 kg, charge = 3.2 × 10?19 C) moves along the positive x axis with a speed of 4.8 × 105 m/s. It enters a region of uniform electric field parallel to its motion and comes to rest after moving 2.0 m into the field. What is the magnitude of the electric field?
A. 2.0 kN/C B. 1.5 kN/C C. 1.2 kN/C D. 3.5 kN/C E. 2.4 kN/C