At what frequency will a 50.0-mH inductor have a reactance XL = 700??
a. 352 Hz
b. 777 Hz
c. 1.25 kHz
d. 2.23 kHz
e. 14 kHz
d
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You are observing the wobble of a star caused by the orbit of a planet around that star. Which property of this system listed below most signi?cantly affects the period of that wobble?
A) the planet's orbital radius B) the planet's mass C) both the planet's orbital radius and its mass D) neither the planet's orbital radius nor its mass
An ideal transformer has 60 turns on its primary coil and 300 turns on its secondary coil. If 120 V at 2.0 A is applied to the primary,
(a) what voltage is present in the secondary? (b) what current is present in the secondary?
Sand dunes form as wind
A) disperses sand. B) blows sand from the back to the front of the dune. C) blows sand from the front to the back of the dune. D) interrupts the normal sequence of deposition.
Describe how Erastothenes measured the circumference of our planet
What will be an ideal response?