Question

Part E Find the speed for a star in which this line appears at wavelength 121.9 nm. Express your answer to three significant

1 0
Add a comment Improve this question Transcribed image text
Answer #1

given wavelength = 121.9

hydrogen transition wavelength = 121.6

X=121.9/121.6 = 1.002 . moving away from us

velocity = 3*10^8( 121.9/121.6) = 3.007*10^8 m/s

Add a comment
Know the answer?
Add Answer to:
Part E Find the speed for a star in which this line appears at wavelength 121.9...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
  • Part A With what minimum speed must you toss a 190 g ball straight up to...

    Part A With what minimum speed must you toss a 190 g ball straight up to just touch the 11-m-high roof of the gymnasium if you release the ball 1.6 m above the ground? Solve this problem using energy. Express your answer to two significant figures and include the appropriate units. CHÅR O ? Value Units Vmin = Submit Request Answer Part B With what speed does the ball hit the ground? Express your answer to two significant figures and...

  • A hydrogen atom, initially at rest, absorbs an ultraviolet photon with a wavelength of 1 =...

    A hydrogen atom, initially at rest, absorbs an ultraviolet photon with a wavelength of 1 = 121.1 nm Part A What is the atom's final speed if it now emits an identical photon in a direction that is perpendicular to the direction of motion of the original photon? Express your answer to three significant figures and include appropriate units. μΑ ? Value Units Submit Request Answer Part B What is the atom's final speed if it now emits an identical...

  • The data encoded on CDs, DVDs, and Blu-ray discs is read by lasers. Part A What...

    The data encoded on CDs, DVDs, and Blu-ray discs is read by lasers. Part A What is the wavelength in nanometers of the CD laser (v = 3.85 x 1014 s-1)? Express your answer to three significant figures and include the appropriate units. LHẢ 5 + 6 3 ? Value Units Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining FIUDICIU. Part B What is the energy in joules of the CD laser (v = 3.85 x...

  • I got R eq = 113.53, but for some reason, I was not able to find...

    I got R eq = 113.53, but for some reason, I was not able to find the needed currents in the circuit. Please give me a clear and detailed answer. Thank you! Review Constants Find io. Use a Y-to-A transformation to find the unknown quantities for the circuit in (Figure 1). Suppose that 0, = 11V. Express your answer to three significant figures and include the appropriate units. MÅ O 2 ? io = -0.011 A io = Submit Previous...

  • Problem 33.118 - Part A What is the wavelength in a medium where the wave speed...

    Problem 33.118 - Part A What is the wavelength in a medium where the wave speed is 2.4x108 m/s? Express your answer with the appropriate units Constants Periodic Table n vacuum, the wavelength of a certain light wave is 450 nm. medium 360 nin Previous Answ er Correct Part B What is the frequency of this light in vacuum? Express your answer to two significant digits and include the appropriate units. vacum 6.7x10Hz Previous Answers Correct Part C What is...

  • Problem 3.62 Use a Y-to-A transformation to find the unknown quantities for the circuit in (Figure...

    Problem 3.62 Use a Y-to-A transformation to find the unknown quantities for the circuit in (Figure 1). Suppose that , -8V Part A Find Express your answer to three significant figures and include the appropriate units. LA © ? Value Units Submit Request Answer Part B Findi Express your answer to three significant figures and include the appropriate units. HA O ? Value Units Submit Request Answer Part C Find 12 Express your answer to three significant figures and include...

  • An EM wave in free space has a wavelength of 710 nm Part A What is...

    An EM wave in free space has a wavelength of 710 nm Part A What is its frequency? Express your answer to two significant figures and include the appropriate units. HA ? f= Value Units Submit Request Answer Part B How would we classify it? visible ultraviolet radio Ο Ο Ο Ο Ο Ο O X-rays O infrared gamma Part A Who will hear the voice of a singer first: a person in the balcony 49.0 m away from the...

  • A sandbag is dropped from a balloon which is ascending vertically at a constant speed of...

    A sandbag is dropped from a balloon which is ascending vertically at a constant speed of 7 m/s. The bag is released with the same upward velocity of 7 m/s when t O and hits the ground whent-9s PartA Determine the speed of the bag as it hits the ground. Express your answer to three significant figures and include the appropriate units. u | Value Units Submit Part B Determine the altitude of the balloon when bag hits the ground...

  • Part D What is the particle's speed at t0s? Express your answer as an integer and...

    Part D What is the particle's speed at t0s? Express your answer as an integer and include the appropriate units. Revievw The position of a particle as a function of time is given by T where t is in seconds. (6.4 i +24 j)t2 nm, alue Units Submit uest Answer ▼ Part E What is the particle's speed at t1-2.9 s? Express your answer to two significant figures and include the ap propriate units Value Units Submit Part F What...

  • Part A Which wavelength of light (in nanometers) is emitted if an electron moves from the...

    Part A Which wavelength of light (in nanometers) is emitted if an electron moves from the conduction band to the valence band in a sample of silicon? (Silicon has a band gap of 1.1 eV.) Express your answer to two significant figures and include the appropriate units. Value Units Submit Request Answer

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT