That every wave length of light except purple is being absorbed by the hat. The hat will be the color purple
Explanation:
Fnet = 12.0N - 5.0N = 7.0N
a = Fnet/m = 7.0N/6.5kg = 1.07m/s².
Answer:
(a) λ= 0.603m
(b) v= 50.8329
(c)
Explanation:
(a)The string is an open pipe and five loops indicates that the wave forms three complete cycle in the string.
A circle represents 1 wavelength. The loops occupy the whole length of the pipe, hence;
3λ = 1.81m
λ=
λ= 0.603m
(b) speed(v) = fλ
v= 84.3 * 0.603
v= 50.8329
(c) The string represents an open pipe.for an open pipe, the fundamental frequency is
Set up a proportion
1 mile/1.6 km = 20,000miles/x
Cross Multiply
x = (20,000) * (1.6)
x = 32,000 kilometers
Answer:
If the temperature of the solar surface is 5800 K then the approximate temperature of the sunspot is a) 4400 K.
Explanation:
The most straightforward way to solve this is using Stefan-Boltzmann law that states that I the energy radiated per unit surface area per unit time (watt per unit area ) of a black body is proportional to the fourth power of the temperature T of the body:
with being the Stefan constant.
A black body is an idealized physical body that is a perfect absorber because it absorbs all incident electromagnetic radiation and is also an ideal emitter. The Sun is considered to be a black body at different layers and different temperatures.
We are told that the intensity of a sunspot is found to be 3 times smaller than the intensity emitted by the solar surface , that means that:
then using the expression of Stefan-Boltzmann law we get that
we cross out and use the fourth root in each side of the equation
then we use that
So finally we get that