Fused quartz has an index of refraction of 1.50 for light from a 678-nm source. What is the speed of light for this wavelength within the quartz? (c = 3.00 × 10^8 m/s)
a. 1.50E+8 m/s
b. 2.00E+8 m/s
c. 2.45E+8 m/s
d. 1.33E+8 m/s
e. 1.50E+8 m/s
b
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The following formulas are supposed to describe the speed 
of a sphere sinking in a thick fluid. C is a unitless constant, 
is the fluid’s density in kg/m3, A is the sphere’s cross-sectional area, m is its mass, and is the gravitational field strength in N/kg. Which could be right?
A. 
= CA g
B. = Cmg/ A
C. = (Cmg/ A)2
D. = (Cmg/ A)1/2
E. None of these can be correct.
Arriving at a conclusion based upon one's observations is known as:
a. inductive reasoning b. deductive reasoning c. critical thinking d. logic e. the scientific method
Four identical particles (mass of each = 0.40 kg) are placed at the vertices of a rectangle (2.0 m × 3.0 m) and held in those positions by four light rods which form the sides of the rectangle. What is the moment of inertia of this rigid body about an axis that passes through the mid-points of the longer sides and is parallel to the shorter sides?
a. 2.7 kg×m2 b. 3.6 kg×m2 c. 3.1 kg×m2 d. 4.1 kg×m2 e. 1.6 kg×m2
In the deep ocean trenches, there are hydrothermal vents, which discharge very hot water. In one such vent, the temperature of the water is 300°C. Why does this water not boil?
What will be an ideal response?