Use your units . . . "period" is time, so you know that you have to
set up your fraction with time in the numerator.
10 seconds / 4 waves =
(10/4) sec/wave = 2.5 seconds per wave.
______________________________________
Notice how the first answer set it up exactly backwards.
He would have seen his mistake immediately if he had
kept the units.
He started out by saying . . . . P = N / t
Keeping the units, P = (waves) / (second)
The answer will have units of "waves per second" .
That's frequency, not period.
Answer:
For a plant cell: The cell wall and the cell membrane
For animal cells: Just the cell membrane
Answer:
67.44 V
Explanation:
Number of turns N =123
Radius = 2.41 cm =0.0241 m
The magnetic field strength increases from 50.9 T to 96.3 T so change in magnetic field dB = 96.3-50.9=45.4 T
Time interval dt = 0.151 sec
We know that the induced emf ![e=-NA\frac{dB}{dt}](https://tex.z-dn.net/?f=e%3D-NA%5Cfrac%7BdB%7D%7Bdt%7D)
Area ![A=\pi r^2=3.14\times 0.0241^2=1.8237\times 10^{-3}m^2](https://tex.z-dn.net/?f=A%3D%5Cpi%20r%5E2%3D3.14%5Ctimes%200.0241%5E2%3D1.8237%5Ctimes%2010%5E%7B-3%7Dm%5E2)
Putting all these values in emf equation
here negative sign indicates that it opposes the cause due to which it is produced
Answer:
2.353 × 10⁵ years
Explanation:
Since speed, v = distance/time
time, t = distance/speed
The distance, d = circumference of orbit = 2πr where r = radius of orbit = 8.5 kiloparsecs = 8.5 kiloparsecs × 3.1 × 10¹³ kilometers/parsec = 26.35 × 10¹³ kilometers and velocity of sun, v = 220 km/s
So, the time it takes to complete one orbit, T is
T = 2πr/v
= 2π × 26.35 × 10¹³ km/220 km/s
= 165.562 × 10¹³ km ÷ 220 km/s
= 0.753 × 10¹³ s
= 7.53 × 10¹² s
We now convert T to years
T = 7.53 × 10¹² s ÷ 3.2 × 10⁷ seconds/year
T = 2.353 × 10⁵ years