The pitch of a sound is determined by the frequency; the higher the frequency, the higher the pitch
Indicate whether the statement is true or false
TRUE
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Uncertainty Principle Using Energy and Time: A laser produces a beam of 4000-nm light. A shutter allows a pulse of light, 30 ps in duration, to pass through. What is the uncertainty in the energy of a photon in the pulse? (1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)
A. 2 ×10-6 eV B. 2 ×10-5 eV C. 2 ×10-4 eV D. 2 ×10-3 eV E. 2 ×10-2 eV
A long, straight wire carrying a current is placed along the y-axis. If the direction of the current is in the +y direction, what is the direction of the magnetic field due to this wire?
A) clockwise, around the x-axis B) counterclockwise, around the x-axis C) counterclockwise, around the z-axis D) counterclockwise, around the y-axis E) clockwise, around the y-axis
Measuring the amount of deuterium in the universe allows us to set a limit on ________
A) the acceleration of the universe B) the total amount of mass in the universe C) the density of ordinary (baryonic) matter in the universe D) the current age of the universe
Charge of uniform density (40 pC/m2) is distributed on a spherical surface (radius = 1.0 cm), and a second concentric spherical surface (radius = 3.0 cm) carries a uniform charge density of 60 pC/m2 . What is the magnitude of the electric field at a point 2.0 cm from the center of the two surfaces?
a. 1.1 N/C b. 4.5 N/C c. 1.4 N/C d. 5.6 N/C e. 0.50 N/C