An aquarium contains a 5-cm layer of water (n = 1.333) floating on top of carbon tetrachloride (n = 1.461). If the angle of incidence into the water from the carbon tetrachloride is 20°, what is the angle of refraction into the air?
A. 20°
B. 30°
C. 38°
D. 69°
E. 26°
Answer: B
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A bowling ball has a mass of 7.00 kg, a moment of inertia of 2.8 × 10^?2 kg·m2, and a radius of 0.100 m. If it rolls down the lane without slipping at a linear speed of 4.30 m/s, what is its angular speed?
a. 70.0 rad/s b. 43.0 rad/s c. 30.1 rad/s d. 0.430 rad/s e. 0.700 rad/s
Water has a specific heat value of ______________
Fill in the blank(s) with correct word
A wheel rotates through an angle of 320° as it slows down from 78.0 rpm to 22.8 rpm. What is the magnitude of the average angular acceleration of the wheel?
A) 2.34 r rad/s2 B) 5.48 rad/s2 C) 6.50 rad/s2 D) 8.35 rad/s2 E) 10.9 rad/s2
Calculate the concentration of vacancies in silicon at the solid-liquid equilibrium temperature of 1683 K where single crystals of silicon are grown. The enthalpy of formation for vacancies in silicon is 2.3 eV/vacancy.
What will be an ideal response?