True, They contain old stars and posses little gas or dust
Answer:
a) v = 2,9992 10⁸ m / s
, b) Eo = 375 V / m
, B = 1.25 10⁻⁶ T,
c) λ = 3,157 10⁻⁷ m, f = 9.50 10¹⁴ Hz
, T = 1.05 10⁻¹⁵ s
, UV
Explanation:
In this problem they give us the equation of the traveling wave
E = 375 cos [1.99 10⁷ x + 5.97 10¹⁵ t]
a) what the wave velocity
all waves must meet
v = λ f
In this case, because of an electromagnetic wave, the speed must be the speed of light.
k = 2π / λ
λ = 2π / k
λ = 2π / 1.99 10⁷
λ = 3,157 10⁻⁷ m
w = 2π f
f = w / 2 π
f = 5.97 10¹⁵ / 2π
f = 9.50 10¹⁴ Hz
the wave speed is
v = 3,157 10⁻⁷ 9.50 10¹⁴
v = 2,9992 10⁸ m / s
b) The electric field is
Eo = 375 V / m
to find the magnetic field we use
E / B = c
B = E / c
B = 375 / 2,9992 10⁸
B = 1.25 10⁻⁶ T
c) The period is
T = 1 / f
T = 1 / 9.50 10¹⁴
T = 1.05 10⁻¹⁵ s
the wavelength value is
λ = 3,157 10-7 m (109 nm / 1m) = 315.7 nm
this wavelength corresponds to the ultraviolet
Answer:
a. They will be tie
b. Win the wood cylinder
Explanation:
a.
The both cylinders will reach the bottom at the same time notice the relation in the equation in indepent of the length and both have the same radius and the same rotational inertia.
![I=\frac{1}{2}*m*r^2](https://tex.z-dn.net/?f=I%3D%5Cfrac%7B1%7D%7B2%7D%2Am%2Ar%5E2)
![a=\frac{g*sin(\beta)}{1+I_{com}/m*r^2}](https://tex.z-dn.net/?f=a%3D%5Cfrac%7Bg%2Asin%28%5Cbeta%29%7D%7B1%2BI_%7Bcom%7D%2Fm%2Ar%5E2%7D)
So both will be tie
b.
![a_{brass}=\frac{g*sin(\beta)}{1+I_{brass}/m*r^2}=a_{wood}=\frac{g*sin(\beta)}{1+I_{wood}/m*r^2}](https://tex.z-dn.net/?f=a_%7Bbrass%7D%3D%5Cfrac%7Bg%2Asin%28%5Cbeta%29%7D%7B1%2BI_%7Bbrass%7D%2Fm%2Ar%5E2%7D%3Da_%7Bwood%7D%3D%5Cfrac%7Bg%2Asin%28%5Cbeta%29%7D%7B1%2BI_%7Bwood%7D%2Fm%2Ar%5E2%7D)
The acceleration of the wood cylinder is larger than the acceleration of the brass cylinder so the cylinder of wood will reach the bottom first
![a_{brass}](https://tex.z-dn.net/?f=a_%7Bbrass%7D%3Ca_%7Bwood%7D)
So the wood win the race
Answer:
I'm sorry I don't have a answer but I like your pfp
Answer:
I can't understand the language....