Answer:
C). Matter can absorb light only in certain specific amounts.
Explanation:
We know that any objects that is heated give out radiation in the form of energy. Classical physics cannot be used to describes black body radiation. Thus Max Plank suggested that had to absorb energy in small packets of energy or in discrete steps. That is matter can not absorb any amount of energy, but it only does in certain amount of energy called the photons.
The energy absorbed or released can be expressed as
ΔE = n.h.v
where n is whole number 1, 2, 3, 4, 5...
h is Planks constant ( 6.626 x J-s
v is light energy absorbed or released
Hence, matter can absorb light energy only in certain specific amounts.
Answer:
The acceleration is a = 2.75 [m/s^2]
Explanation:
In order to solve this problem we must use kinematics equations.
where:
Vf = final velocity = 13 [m/s]
Vi = initial velocity = 2 [m/s]
a = acceleration [m/s^2]
t = time = 4 [s]
Now replacing:
13 = 2 + (4*a)
(13 - 2) = 4*a
a = 2.75 [m/s^2]
To develop this problem it will be necessary to apply the concepts related to the frequency of a spring mass system, for which it is necessary that its mathematical function is described as
Here,
k = Spring constant
m = Mass
Our values are given as,
Rearranging to find the spring constant we have that,
Therefore the spring constant is 1.38N/m