Answer:
Frequency = 24 × 10⁸ Hz
Explanation:
Given the following data;
Speed = 3 × 10⁸ m/s
Wavelength = 0.125 meters
To find the frequency of the electromagnetic wave;
Mathematically, the speed of a wave is given by the formula;
Speed = Wavelength × frequency
Substituting into the formula, we have;
3 × 10⁸ = 0.125 × frequency
Frequency = (3 × 10⁸)/0.125
Frequency = 24 × 10⁸ Hz
Explanation:
Distance is 250m
Time is 50sec
Formular
Speed= distance/time
Speed=250/50
Speed is 5m/s
If correct mark as brainliest
The sun spectrum is <span>The </span>Sun<span> emits light primarily in the visible </span>spectrum<span>, but it also emits at other wavelengths, as illustrated in the following figure.</span>
Answer:
209.68 years
Explanation:
Let T be the half life.
t = 1 year
N = 99.67 % of No = 0.9967 No
Use the law of radioactivity
N = No x e ^(- λ t)
Where, λ is decay constant.
λ = 0.6931 / T
So,
0.9967 No = No x e^(- λ t)
0.9967 = e^(- λ t)
e^( λ t) = 1 / 0.9967 = 1.0033
λ t = 3.3 x 10^-3
(0.6931 x 1) / T = 3.3 x 10^-3
T = 209.68 years
Thus, the halflife is 209.68 years.
Answer:
1.18 sec
Explanation:
v = 0
u = 3.25m/s
v = u - gt
t1 = u/g = 3.25/9.8 = 0.332 s
height above board = v²/2g =
3.25²/(2×9.8) = 0.54 m
time to fall from there to water
t2 = √(2h/g) = √(2(3+ 0.54)/9.8) = 0.85 s
total time = t1 + t2
total time = 0.85 + 0.332 = 1.182 s
