Calculating Wavelength with Wave Speed and Period | Physics Homework Help

  • Thread starter Thread starter bfitzp
  • Start date Start date
  • Tags Tags
    Wavelength
AI Thread Summary
To calculate the wavelength of a wave with a speed of 160 m/s and a period of 4.9 ms, the formula λ = vT is used. The initial calculation resulted in λ = 160 m/s x 4.9 ms, yielding 784m. However, the period must be converted to seconds for proper unit consistency, as 4.9 ms equals 0.0049 seconds. After correcting the calculation to λ = 160 m/s x 0.0049 s, the correct wavelength is found to be 0.784 m. Ensuring unit conversions are properly applied is crucial for accurate results.
bfitzp
Messages
4
Reaction score
0

Homework Statement


What is the wavelength λ of a wave that has a speed of 160 m/s and a period of 4.9 ms?


Homework Equations


λ = vT


The Attempt at a Solution


λ = 160 x 4.9
= 784m


However this answer is showing up as inccorect when I submit it online. What am I doing wrong?
 
Physics news on Phys.org
what is the answer?
 
You should check the units of what you computed.
 
The units are metres. Cant see why 784m is being marked as incorrect.
 
bfitzp said:
The units are metres. Cant see why 784m is being marked as incorrect.

They're not metres and that's your problem. Go back and do the calculation again, but include the units and any conversions that you need to do.
 
Ah yes, don't know how I missed that. Cheers mate.
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »
Thread 'A bead-mass oscillatory system problem'

Thread 'A bead-mass oscillatory system problem'

I can't figure out how to find the velocity of the particle at 37 degrees. Basically the bead moves with velocity towards right let's call it v1. The particle moves with some velocity v2. In frame of the bead, the particle is performing circular motion. So v of particle wrt bead would be perpendicular to the string. But how would I find the velocity of particle in ground frame? I tried using vectors to figure it out and the angle is coming out to be extremely long. One equation is by work...
View full post »

Similar threads

Calculating the Planck Length
Replies
3
Views
296
What is the observed wavelength of the Hα line?
Replies
3
Views
2K
Compare the wavelengths of a photon and an electron
Replies
2
Views
4K
Peak wavelength and Spectral Bandwidth
Replies
4
Views
2K
Two loudspeakers emit waves, find wavelength
Replies
1
Views
1K
How to find wavelength of wave?
Replies
4
Views
2K
Slit Width & Single Slit Diffraction
Replies
3
Views
2K
Wave Speed & Distance: Solving Wave Problems
Replies
8
Views
3K
What Visible Wavelengths Cause Maximum Constructive Interference in a Thin Film?
Replies
1
Views
3K
Compton Scattering- finding photon wavelength
Replies
5
Views
2K

Hot Threads

Recent Insights

Back
Top