A sound source approaches a stationary observer. The frequency heard by the observer is
A) higher than the source.
B) lower than the source.
C) the same as that of the source.
D) equal to zero.
E) impossible to predict.
A
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Provided following are stages that occurred during the formation of our solar system. Rank these stages from left to right based on when they occurred, from first to last.
What will be an ideal response?
Saturn's moon named ______________ is the second largest moon in the solar system
a. Titan b. Europa c. Ganymede d. Phobos e. Diamos
Impedance: A series ac circuit has a resistance of 4.0 ?, a capacitive reactance of 26 ?, and an inductive reactance of 17 ?. Find the impedance of the circuit.
A. 9.8 ? B. 31 ? C. 13 ? D. 47 ?
A 20 solar mass star will stay on the main sequence for 10 million years, yet its iron core can exist for only a
A) day. B) week. C) month. D) year. E) century.