Answer:
Speed = 0.296m/2
Period = 0.203 s
Explanation:
If by 'long' you mean the wavelength of the waves, then the wavelength .
The frequency of the waves is 14.8 waves every 3 seconds or
.
Now the relationship between wavelength , frequency
and speed
of the waves is:
We put in the values and
and get:
Now the period is just the inverse of the frequency, or
Answer:
B) 55.8°
Explanation:
n₁ = Refractive index of liquid = 2
n₂ = Refractive index of diamond = 2.419
Here it can be seen that the light ray is in the more dense medium and approaching the less dense medium which is a case of total internal reflection.
Critical angle
∴ Critical angle is 55.8°
Answer:
F = - 50 N
Hence, the magnitude of resultant force is 50 N and its direction is leftwards.
Explanation:
The magnitude of the resultant force is always equal to the sum of all forces. While, the direction of resultant force will be equal to the direction of the force with greater magnitude:
considering right direction to be positive:
F₁ = Force applied on right rope = 150 N
F₂ = Force applied on left rope = 200 N
Therefore, the resultant force can be found by using these values in equation:
<u>F = - 50 N</u>
<u>Hence, the magnitude of resultant force is 50 N and its direction is leftwards.</u>