Find the velocity of an electron
Find the velocity of an electron emitted by a metal whose threshold frequency is 2.15×1014 {rm s^{-1}} when it is exposed to visible light of wavelength 4.76×10-7 {rm m}.
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A baseball is hit with a speed of 27.0 at an angle of 47.0. It lands on the flat roof of a 12.0 -tall nearby building. If the ball was hit when it was 1.2 above the ground, what horizontal distance does it travel before it lands on the building?
First determine the number of moles of rm Na^+ using the given molarity and volume. Next, use the chemical formula to determine the number of moles of rm Na_3PO_4 needed. Finally, convert moles to grams using the molecular weight of the compound.
For a solution having 1 x 10-3 equivalents/liter total alkalinity (contributions from HCO3-, CO32- and OH-) at [H+]=4.69 e-11, what is the percentage contribution to the alkalinity from CO32-?
Assume that a seismically excited system is accurately modeled by a mass attached to the ground by a spring and a damper in parallel. You need to determine whether the weld connecting the spring to the mass will hold
What amount of energy is required to completely ionize 6.2 grams of carbon atoms in the gas phase (C(g)) if the ionization energy of C(g) is 1086 kJ/mole?
A solid sphere (I = 0.4MR2) of radius 0.06 m and mass 0.50 kg rolls without slipping 14m down a 30º inclined plane. At the bottom of the plane, the linear velocity of the center of mass of the sphere is approximately?
A bright orange ceramic "Fiestaware" plate is found to have an activity of 12.49 disintegrations per second (Becquerels or Bq), due to the uranium-238 used in the pigment. The half life for decay of uranium-238 is 4.5 x 109 years. Assuming that ur
You have researched a new type of switch and proved that upgrading your switches to this model is feasible. What step do you take next before replacing your old switches?
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Problem: Which of the following are signs of vulvovaginal candidiasis? More than one answer may be correct.
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Question: Which of the following is the most important feature in an experimental study?