What is quantum mechanics?
A) a branch of physics that applies on very small scales
B) the idea that mechanics can be understood only if we first understand quantum
C) the idea that quantitative methods are needed to understand physics
D) a branch of physics that deals with the curvature of spacetime
E) a branch of physics that deals with the properties of gases
A) a branch of physics that applies on very small scales
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Stephanie dips a glass rod into vegetable oil. The submerged part of the rod can't be seen because
A) refraction is unbent before light gets to your eye. B) both the oil and glass have the same index of refraction. C) of internal reflection. D) light has different speeds in the oil and glass.
Identify the FALSE statement. Stellar nucleosynthesis:
is the term for the process by which stars create the heavier elements. means stars use their small atoms to produce larger atoms. is a normal process that happens during the life cycle of stars. reactions vary and are dependent on the mass of the star. produces elements up to atomic number 26 (iron) in low-mass stars like our Sun.
Why is the southern hemisphere of Mars believed to be older than the northern?
A) The southern hemisphere is darker much like the lunar mare. B) The southern hemisphere is more heavily cratered. C) The northern hemisphere is higher, due to the Tharsis Bulge. D) The northern hemisphere leans more away from the Sun in winter. E) The south polar cap is much thicker than the north one.
The magnitude of the Poynting vector of a planar electromagnetic wave has an average value of 0.724 W/m2. What is the maximum value of the magnetic field in the wave?
(c = 3.0 × 108 m/s, ?0 = 4? × 10-7 T • m/A, ?0 = 8.85 × 10-12 C2/N • m2) A) 77.9 nT B) 55.1 nT C) 38.9 nT D) 108 nT E) 156 nT