Chromatic aberration can be corrected by combining two or more lenses to form a compound lens
Indicate whether the statement is true or false
TRUE
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At what speed is the momentum of an object five times that found classically?
a. 0.894c b. 0.960c c. 0.980c d. 0.800c e. 0.999c
A large coal-fired electric generating plant burns about 1000 kg [one tonne] of coal every 10 seconds. About much of the tonne actually goes into producing electric energy?
A) 990 kg B) 400 kg C) 800 kg D) 100 kg E) 40 kg
The bathyscaphe Trieste consists of a thin-walled but very strong cylindrical hull, 15.2 m long and 3.66 m in diameter,
filled with gasoline with a density of 880 kg/m3 to make it buoyant. If it is totally submerged in seawater with a density of 1025 kg/m3 and neither rising nor sinking, what is the weight of the Trieste craft? A) 127 kN B) 227 kN C) 327 kN D) 427 kN E) 527 kN
A string with a fixed frequency vibrator at one end is undergoing resonance with 4 antinodes when under tension T1 . When the tension is slowly increased the resonance condition disappears until tension T2 is reached, there being no resonances occurring between these two tensions. How many antinodes are there in this new resonance?
a. 3 b. 4, since all resonances in this situation have the same number of nodes c. 5 d. 2, since resonances only involve whole wavelengths e. 6, since resonances only involve whole wavelength