In the picture shown, the lines are called __________________
Fill in the blank(s) with correct word.
boundaries
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________ occurs when an electron in an atom jumps from a lower energy orbital to a higher energy orbital.
A. Acceleration B. Ionization C. Relaxation D. Excitation
When a bar magnet is thrust into a coil of copper wire, the coil tends to
A) attract the magnet as it enters. B) repel the magnet as it enters. C) both of these D) neither of these
A 100-kW radio station emits EM waves in all directions from an antenna on top of a mountain. What is the intensity of the signal at a distance of 10 km?
a. 8 × 10^?5 W/m2 b. 8 × 10^?6 W/m2 c. 3 × 10^?3 W/m2 d. 0.8 W/m2 e. 2.5 × 10^?5 W/m2
How far away can two point sources of wavelength 500 nm be if they are just resolved in a telescope of aperture 1.5 cm?
A. 25 km B. 12 km C. 90 m D. 12 m E. more information is needed