physics

1. Calculate the frequency (Hz) and energy (eV) of green photons with wavelength of 555nm. Photon energy = hν, where ν = frequency in Hz and h = 6.626x10-34 joule-sec, the Planck’s constant. Keep in mind that: wavelengthxfrequency = speed.

2. Andy Rud!@#\$%^& can serve tennis balls at 140 mile per hour. When the ball is frying at this speed, calculate the kinetic energy and express it in Joules. You would need to measure the mass of a tennis ball in grams. For your information, 1 oz. = 454 grams/16 = 28.4 grams.

1. 👍 0
2. 👎 0
3. 👁 149
1. If y0u are trying to cut and paste, please be advised that you will need to type your question. Cut and paste won't work for you.

1. 👍 0
2. 👎 0
posted by DrBob222

Similar Questions

1. Physics

I need help solving this please! I think that for part (b) I can use energy and wavelength to solve for frequency and the one with the highest frequency is the most damaging, but I'm not sure what to do for part (a). You want to

asked by Brianna on August 15, 2010
2. Quantum Physics

How is it a substance can emit photons of visible light after absorbing ultra violet photons but not with infrared radiation The re-emitted photons must be of lessor energy (longer wavelength) than the incident photons. In a

asked by Sue on March 11, 2007
3. science

What is the wavelength of waves transmitted by an AM radio station operating at a frequency of 840 kilohertz? Calculate the energy of a photon whose frequency is 2450 megahertz What is the difference in energy for a photon of

asked by anna on December 5, 2012
4. chem

A photon of ultraviolet (UV) light possesses enough energy to mutate a strand of human DNA. What is the energy of a single UV photon having a wavelength of 24 nm? What is the energy of a mole of UV photons having a wavelength of

asked by sarah on January 20, 2008
5. Chemistry

E=hv E=energy h= Planck's constant =6.626 x 10^-34 v= frequency 1. What is the energy of light having a frequency of 2.28 x 10^12? ( I do have an answer for this but I'm not so sure about it.) 2.What is the energy of light with a

asked by Ann on December 3, 2014
6. physics

Which of the following is true for the transition of electrons from a higher energy to a lower energy state? Choose one answer. a. The greater the energy difference between the levels, the more is the wavelength of the photons

asked by ashley -- on April 28, 2011
7. physics

Which of the following is true for the transition of electrons from a higher energy to a lower energy state? Choose one answer. a. The greater the energy difference between the levels, the more is the wavelength of the photons

8. Chemistry

"The sun emits UV radiation that can have serious health consequences. In particular, so-called UVB radiation is mostly absorbed by the ozone layer in the upper atmosphere (altitudes of 10 - 50 km), but the part that reaches the

asked by Travis on September 13, 2012
9. physics help

help me with this question 2. A hydrogen electron drops from the n=4 level to the n=1 level. A. What is the energy of an emitted photon? B. Calculate the frequency of the photon. C. Calculate the wavelength of the photon.

asked by carey on January 23, 2012
10. chemistry

Calculate the energy in joules per photon of red light having a wavelength 655 nm. What is the energy of 1 mol of these photons?

asked by ashley b on June 23, 2011

More Similar Questions