How long does it take a 15 Hz oscillating spring to complete one cycle?
Answer a.) 0.067 s
Explanation : The time required for one repetition is called the period. The period is the duration of one cycle. The frequency is the number of cycles per unit time. Here 15 Hz = 15cycles/s
period = 1cycle/frequency = 1cycle/15cycles/s = 1/15 s = 0.066 s ≈ 0.067 s
Hope this helps!
To find wave speed, you multiply the wavelength by the frequency. This means it is 8 times 11. This gives you 88. That means the answer is 88mm/s
The direction of the light can be changed by reflection from a reflecting surface and by the refraction of the light through a medium of different refractive index.
What is reflection?
The phenomenon of the light in which the light ray bounces back from the surface on which they fall is called the reflection.
Now when the light ray falls on a surface that is well polished like the mirror, then the light ray changes its direction. So by using the combination of mirrors, the direction of the light ray can be changed.
What is refraction?
Refraction is a phenomenon in which light rays change their path slightly when it is passing through a transparent medium with a different refractive index.
The concave and convex lens uses this property of light. So by using the convex and concave lens, the direction of the light ray can be changed.
Learn more about refraction.
You give the ball to the other team
As we know that Force = mass * acceleration.
Here a force of 186 N acting on 7.3 kg ball will create acceleration = 186/7.3 = 25.48 m/s2
Also, change in velocity can be found as, acceleration multiplied by time it is acting on object.
Therefore, change in velocity = 24.48 * 0.4 = 10.19 m/s