Which of the following do the atoms 14C and 14N have in common?
A) total number of protons and neutrons
B) number of electrons
C) number of neutrons
D) number of protons
A
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(a) Calculate the magnetic field created by a coil made of copper wire that has 200 turns in 5 cm and carries a current of 5 A. (b) What is the magnitude of the flux density or inductance created by this coil in a vacuum?
If the visible wavelengths of light range from 400 nm to 750 nm, what is the highest frequency associated with visible light?
A) 3.0 × 108 Hz B) 7.5 × 1014 Hz C) 2.3 × 1020 Hz D) 4.0 × 1014 Hz E) 5.0 × 108 Hz
If we restrict the vibrations of the electric field vector of a wave to one direction, the wave is said to be linearly ______________
Fill in the blank(s) with correct word
When a light wave enters into a medium of different refractive index,
A) its speed, frequency, and wavelength change. B) only its speed and frequency change. C) only its speed and wavelength change. D) only its frequency and wavelength change.