The wavelength of a wave is 2) A) the distance between two adjacent peaks of the wave. B) equal to the speed of the wave times t
1 answer:
Answer:
Wavelength = the distance between two adjacent peaks of the wave.
Explanation:
The wavelength of a wave is defined as the distance between two adjacent peaks of the wave or it is defined as the distance between two consecutive crests and troughs. It is denoted by . Its SI unit is meters.
The relation between the frequency and the wavelength is given by :
Where
v is the speed
So, the correct option is (a). " the distance between two adjacent peaks of the wave".
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Answer:
t= 25.04 s
Explanation:
Given that
Initial angular speed ,ωi= 26 rad/s
Angular acceleration ,α=0.43 rad/s²
We know that kinetic energy of the wheel given as
I=Mass monent of inertia
ω=Angular speed
If kinetic energy is two time then the final angular speed
We know that
t= 25.04 s
After 25.04 s then kinetic energy will become two times of the initial kinetic energy.
Answer:
1.35 V
Explanation:
Given:
Capacitance of the capacitor (C) = 1.3 μF =
Frequency (f) = 3.9 kHz= 3.9 × 1000 Hz = 3900 Hz [1 kHz = 1000 Hz]
Current flowing in the circuit (I) = 43 mA = 0.043 A [1 mA = 0.001 A]
Now, as only capacitor is there in the circuit, the impedance of the circuit is equal to the reactance of the capacitor.
So,
The reactance of the capacitor is given as:
Plug in the values given and solve for . This gives,
Therefore, the impedance is,
Now, the voltage needed to create the given current is obtained using the formula from Ohm's law and is given as:
Therefore, the voltage needed to create a current of 43 mA is 1.35 V.