Answer:
t = 2 s
Explanation:
As we know that when object comes back to its initial position then the displacement of the object will be zero
so here we can say by kinematics equation
here we know that
now from above equation we know
so from above equation we have
t = 2 s
<span>You are given a thin film of oil (n = 1.27) that is located on smooth, wet pavement. Also, it is said that it is viewed perpendicular to the pavement and that the film reflects most strongly red light at 640 nm and reflects no blue light at 427 nm. You are asked to find the thickness of the oil film.
The first thing you need to do is to divide the wavelength of the red light by the index of refraction of the oil to determine the wavelength of the red light in the oil. Then you will use 2t = m</span>λ<span> where t is the thickness, </span>λ is the wavelength and m is the magnification. Note that it is viewed in a perpendicular pavement,<span> m = 1 because it is a constructive interference.
</span>
2t = mλ
2t = (1) (640nm/1.27)
2t = 503.94 nm
t = 251.97 nm<span>
</span>
Answer:
The value is
Explanation:
From the question we are told that
The value of the external force is
The magnitude of the astronaut's acceleration is
Generally Newton's Second Law of Motion from the mass of the astronauts is mathematically represented as
=>
=>
We are required in this problem to approximate tan α which <span>α is less than </span><span>20 degrees.
In radians 20degrees is equal to 0.349; find tan 0.349=0.363
percentage error=(0.349-.363)*100/(0.363) =-3 percent error so for largest angle 20 degrees , the error is less than 10 percent</span>
The angle of a resultant vector is given by the equation
Explanation:
When we compute the resultant vector starting from 2 (or more) vectord, we add the components along the x- and y- direction of the original vectors, in order to find the component of the resultant vector along the two directions.
Let's call:
the component of the resultant vector along the x-direction
the component of the resultant vector along the y-direction
The magnitude of the resultant vector is then given by Pythagorean's theorem:
While the angle can be found by taking the arctangent of the ratio between the y-component and the x-component, mathematically:
Note that this angle is measured between the resultant vector and the positive direction of the x-axis.
Learn more about vector components:
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