What is the composition of minerals?
Minerals are composed of elements.
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Single-Slit Diffraction: The figure shows the resulting pattern when a single slit is illuminated by monochromatic light. The slit is 0.3 × 10-3 m wide and is illuminated by light of wavelength 506 nm. A diffraction pattern is seen on a screen 2.8 m from the slit. What is the linear distance on the screen between the first two diffraction minima on either side of the central diffraction maximum?
Fill in the blank(s) with the appropriate word(s).
A block having mass m travels along a horizontal frictionless surface with speed v. What is the smallest amount of work that must be done on the block to reverse its direction?
1.–mv² 2.–½mv² 3.0 4.½mv² 5.mv² 6.None of the above 7.Cannot be determined
Two tiny beads are 25 cm apart with no other charges or fields present. Bead A carries 10 µC of charge and bead B carries 1 µC. Which one of the following statements is true about the magnitudes of the electric forces on these beads?
A) The force on A is exactly equal to the force on B. B) The force on B is 10 times the force on A. C) The force on A is 100 times the force on B. D) The force on B is 100 times the force on A. E) The force on A is 10 times the force on B.
If an electron has a measured wavelength of 1.20 × 10^-10 m, what is its kinetic energy? (h = 6.63 × 10^-34 J×s, 1 eV = 1.6 × 10^-19 J, and me = 9.11 × 10^-31 kg)
a. 209 eV c. 105 eV b. 55.0 eV d. 147 eV