Suppose two flat glass plates 30-cm long are in contact along one end and separated by a human hair at the other end. If the diameter of the hair is 50 ?m, find the separation of the interference fringes when the plates are illuminated by green light, ? = 546 nm.
What will be an ideal response?
1.64 mm
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How much energy is dissipated as heat during a two-minute time interval by a 1.5-kW resistor which has a constant 20-V potential difference across its leads?
a. 58 J b. 46 J c. 32 J d. 72 J e. 16 J
Life is present on Earth because of oxygen
a. True b. False Indicate whether the statement is true or false
Molecular Rotation: For a diatomic quantum mechanical rotator, the energy difference between adjacent energy levels
A. increases as L increases. B. decreases as L increases. C. is constant for all L. D. varies randomly as L increases.
Sea breezes that occur near the shore are attributed to a difference between land and water with respect to what property?
a. mass density b. coefficient of volume expansion c. specific heat d. emissivity