The current in a coil increases from 2.0 A to 12. A in 50. ms. Calculate the voltage induced in the coil if its self-inductance is 0.120 H
What will be an ideal response?
24. volts
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The H? line has a wavelength of 434.0 nm when observed in the laboratory. If the H? line appears in a stars spectrum at 434.5 nm, what is the radial velocity of the star?
a. 346 km/s away from the observer b. 346 km/s toward the observer c. 1.3 × 10^8 m/s away from the observer d. 1.3 × 10^8 m/s toward the observer e. The radial velocity of the star cannot be determined from this information.
Energy and Mass: In a certain chemical reaction, 8.1 × 10-19 J of energy is released per molecule formed. What is the difference in mass per molecule between the sum of the masses of the molecules of the reagents before the reaction and the mass of the molecules produced by the reaction? (c = 3.0 × 108 m/s)
A. 8.1 × 10-28 kg B. 2.7 × 10-27 kg C. 3.2 × 10-27 kg D. 5.4 × 10-32 kg E. 9.0 × 10-36 kg
The white arrow points to an object that lies within the disk of the galaxy shown. What is this object?
A) a supernova B) an accretion disk around a supermassive black hole C) an extremely bright supergiant star D) an ionization nebula
The sedimentary rock known as ______________ consists of deposits of calcium carbonate (calcite)
a. coal b. sandstone c. limestone d. lodestone