What is the reactance of a 20-mH inductor at a frequency of 60 Hz?
A) 0.13 ? B) 1.2 ? C) 7.5 m? D) 1.2 m? E) 7.5 ?
E
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The observed relationship between the masses of central black holes and the bulge masses of galaxies implies that ________
A) the black hole will eventually suck in the rest of the galaxy B) galaxy formation and supermassive black hole formation must be related somehow C) quasars were more common 10 billion years ago than they are today D) the biggest galaxies have the most luminous quasars
Identify path C in the figure as isobaric, isothermal, isovolumetric, or adiabatic
A neutron has a mass of 1.67 × 10^-27 kg. Its de Broglie wavelength is 1.4 × 10^-10 m. What is its kinetic energy (in eV)?
a. 4 b. 0.4 c. 0.04 d. 40 e. 0.08
In a section of horizontal pipe with a diameter of 3.00 cm the pressure is 100 kPa and water is flowing with a speed of 1.50 m/s. The pipe narrows to 2.00 cm. What is the pressure in the narrower region?
A) 95.4 kPa B) 47.7 kPa C) 44.4 kPa D) 225 kPa E) 66.7 kPa