When you stretch a spring 13 cm past its natural length, it exerts a force of 21 N. What is the spring constant of this spring?
2 answers:
Answer:
Explanation:
From Hooke's law,
Substistuting the values, you can ignore the minus sign, since it is there to state that the force is always in the opposite direction of the deformation, and has no influence otherwise, and your constant is
Answer:
Spring constant, k = 161.5 N-m
Explanation:
It is given that,
Force on spring, F = 21 N
The spring is stretched 13 cm past its natural length i.e. x = 0.13 m
The Hooke's law gives the relationship between the force and the compression in the spring. Mathematically, it can be written as :
k is spring constant
-ve sign shows the direction of force is opposite
So,
k = 161.5 N-m
Hence, this is the required solution.
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Answer:
The order of increasing energy is as follows
"microwave < infrared < visible < ultraviolet"
Option (A) is correct.
Explanation:
Given:
Arrange the following spectral regions in order of increasing energy: infrared, microwave, ultraviolet, visible.
From the formula of energy in terms of frequency.
Where planck constant,
frequency of light.
From above formula we can conclude that higher frequency means higher energy.
In our case ultraviolet has higher frequency and microwave has lower frequency.
So ultraviolet has higher energy and microwave has lower energy.
microwave < infrared < visible < ultraviolet
Therefore, the order of increasing energy is as follows
"microwave < infrared < visible < ultraviolet"