Even in degenerate matter, pressure depends on temperature
Indicate whether the statement is true or false
F
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A beam of light, traveling in air, strikes a plate of transparent material at an angle of incidence of 56°. It is observed that the reflected and refracted beams form an angle of 90°. What is the index of refraction of this material?
A) n = 1.43 B) n = 1.53 C) n = 1.40 D) n = 1.48 E) n = 1.44
Mass on a Spring: A block attached to an ideal spring of force constant (spring constant) 15 N/m executes simple harmonic motion on a frictionless horizontal surface. At time t = 0 s, the block has a displacement of -0.90 m, a velocity of -0.80 m/s, and an acceleration of +2.9 m/s2. The mass of the block is closest to
A. 2.3 kg B. 2.6 kg C. 4.7 kg D. 9.4 kg
Circular Apertures: Light of wavelength 500 nm illuminates a round 0.50-mm-diameter hole. A screen is placed 6.0 m past the slit. What is the width of the central bright circle on the screen?
A. 15 mm B. 260 ?m C. 7.3 mm D. 3700 ?m
Potential of Point-Charges: The three point charges shown in the figure form an equilateral triangle with sides 4.9 cm long. What is the electric potential (relative to infinity) at the point indicated with the dot, which is equidistant from all three charges? Assume that the numbers in the figure are all accurate to two significant figures. (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
A. 0.00 V B. 1300 V C. 640 V D. 1900 V