The path difference between two waves is 5 m. If the wavelength of the waves emitted by the two sources is 4 m, what is the phase difference (in degrees)?
A. 90
B. 400
C. 1.57
D. 7.85
E. 15
Answer: A
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Meters: A galvanometer has a coil with a resistance of 24.0 ?, and a current of 180 ?A causes full-scale deflection. If the galvanometer is to be used to construct an ammeter that deflects full scale for 10.0 A, what shunt resistor is required?
A. 234 ?? B. 342 ?? C. 432 ?? D. 423 ??
If a hydrocarbon is not aliphatic, it is ______________
Fill in the blank(s) with correct word
The break-up of Pangaea began in the Mesozoic era
A) with the rifting apart of North America and Africa. B) with the collision of North America with Africa. C) with the formation of the Himalayan Mountains. D) at the end of the Ordovician.
A heat engine that in each cycle does positive work and loses energy as heat, with no heat energy input, would violate:
A. the zeroth law of thermodynamics B. the first law of thermodynamics C. the second law of thermodynamics D. the third law of thermodynamics E. Newton's second law