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1. A harmonic oscillator has a period of vibration of 4 second.
a) Explain what is the frequency of vibration?
b) Explain how many times does the harmonic oscillator pass its starting point in 1 minute?
2. Take a wave of infrared radiation of wavelength 1.0x10-3 cm. If the amplitude of the wave =0 at time t=0 .Explain what fraction of the maximum amplitude the wave possess at time t= 16.68 second?
3. Radiation of wavelength 620 nm passes through 2 small slits that are 1 cm apart. Will waves that are diffracted by 60 degree on the same direction from the two slits completely reinforce each other?
4. Compute the velocity of photoelectrons ejected from a sodium metal surface. With work function of 2.46 eV by ultraviolet light of wavelength 250 nm?
Given that the solubility product for La(IO3)3 is 1.0 x 10-11, what is the concentration of La3+ in a saturated solution of lanthanum iodate?
Use IR tables to locate absorption bands of the stretching frequencies of the alkyne C
Explain why neither triphenylmethanol, (C6H5)3COH, nor benzophenone, C6H5COCH5, was produced in the reaction between C6H5MgBr and CO2
Compute for q for the reversible isothermal expansion at 300K of 5.0 mol of a perfect gas from 500 to 1500 cubic cm
list at least four themes by which enzymes interact with substrate to lower the transition state
Acid #1 has 1700 mg of sodium bicarbonate, antacid #2 has 500 mg of calcium carbonate. Which tablet is capable of reducing the most acid and why?
A copper wire (density = 8.96 g/cm3) has a diameter of 0.27 mm. If a sample of this copper wire has a mass of 35 g, how long is the wire?
The iron content of an ore can be determined by a redox titration using K2Cr2O7 as the titrant. A sample of the ore is dissolved in concentrated HCl using Sn2+ to speed its dissolution by reducing Fe3+ to Fe2+.
Which of the bonding forces from the list above would need to be overcome to convert CCl4 from a liquid to a gas? (Enter the letters in order of all that apply, e.g. AB, ABD, ACDE, etc.)
which one of the following cell combinations would best be used to set up a cell with a potential of 0.50v by
Elemental analysis of a compound containing H, B and O gave 1.3% H and 27.5% B. The molecular weight of the compound is 157.3. What is the molecular formula of the compound. a. H3B5O6 b. H2B4O7 c. H2B5O9 d. H2B4O8
customers complain that the plants they buy look "different" when they get them home. The electric bill to run the store is excessive.
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