Answer:
in the downward movement of the movement when the constant is lost
Explanation:
When the coin is on the piston it has a relationship given by
a = d²x / dt²
the piston position is
x = A cos wt
a = - A w² cos wt
the maximum acceleration is
a = - A w²
When the piston raises the acceleration of gravity and that of the piston go in the same direction, when the piston descends they relate it is contrary to gravity, therefore when the frequency increases, the point where the acceleration of the piston is greater than gravity arrives and the coin loses contact.
The point where you lose contact is
a = g
g = A w²
In short, in the downward movement of the movement when the constant is lost
The ray will not emerge into the air medium from glass medium.
To find the answer, we need to know about the critical angle.
<h3>What's critical angle of glass?</h3>
- Critical angle of a medium can be determined from the relation as sinФ = 1/n, n = refractive index of that medium.
- As glass has refractive index of 1.5, so Critical angle = sin⁻¹(1/1.5) = 42 °
<h3>Why does the light incident at 45° inside a glass not emerge to the air medium?</h3>
- As we got the critical angle of glass is 42°, so the light incident at 45° which is greater than 42° will reflect back into the glass medium instead of emergence into the air medium.
Thus, we can conclude that the light will not emerge into air medium.
Learn more about the critical angle here:
brainly.com/question/15009181
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Answer:
a ) 2.368 rad/s
b) 3.617 rad/s
Explanation:
the minimum angular velocity that Prof. Stefanovic needs to spin the bucket for the water not to fall out can be determined by applying force equation in a circular path
i.e
------ equation (1)
where;
Also
since; that is the initial minimum angular velocity to keep the water in the bucket
Now; we can rewrite our equation as :
So; Given that:
The rope that is attached to the bucket is lm long and his arm is 75 cm long.
we have our radius r = 1 m + 75 cm
= ( 1 + 0.75 ) m
= 1.75 m
g = acceleration due to gravity = 9.81 m/s²
Replacing our values into equation (2) ; we have:
b) if he detaches the rope and spins the bucket by holding it with his hand ; then the radius = 0.75 m
∴
Answer:
Explanation:
Given that,
The peak wavelength is
λp = 475nm
Then, we want to find the temperature,
From Wein's displacement law,
When the maximum is evaluated from the Planck radiation formula, the product of the peak wavelength and the temperature is found to be a constant (k = 2.898 ×10^-3 mK)
So, applying this we have
λp•T = 2.898 ×10^-3
T = 2.898 × 10^-3 / λp
T = 2.898 × 10^-3 / 475 × 10^-9
T = 6101.05 K
Resultant is 5 m/s using the Pythagorean theorem<span />