he minimum wavelength of electromagnetic radiation that is capable of removing electrons from the surface of barium metal is 693 nm. i. Calculate the work function for barium metal in kilojoules per mole of electrons ejected. If a light source with a frequency of 3.75x10^14 s‒1 is directed at the surface of barium metal, what will be the maximum kinetic energy of the ejected electron

Help with a iv, b and c

A proton has a de Broglie wavelength of 81.20 fm. What is its speed? m/s

B4. A bone sample has a density p = 1.2x10³ kg/m³, a molar mass m = 217 g/mol and an interaction cross section per atom o = 6.0x10-22 cm². Determine the linear attenuation coefficient µ (in cm-¹) and the half value layer (in cm). Assume there is no scattering when the radiation interacts with the bone sample. Express the values to 3 significant figures, if necessary.

A) Find the wavelength of a photon that has energy of 27 eVeV. Express your answer with the appropriate units.   B) Find the wavelength of an electron that has energy of 27 eVeV. (The energy of the electron is its kinetic energy.) Express your answer with the appropriate units.

Attached is question.

A recent study found that electrons that have energies between 3.45 eV and 20.5 eV can cause breaks in a DNA molecule even though they do not ionize the molecule. If a single photon were to transfer its energy to a single electron, what range of light wavelengths could cause DNA breaks? minimum wavelength: radio In which part of the electromagnetic spectrum does this light lie? O ultraviolet infrared nm gamma ray maximum wavelength: nm

What is the energy range (in joules and eV) of photons in the visible spectrum, of wavelength 410 nm to 740 nm ? Express your answers using two significant figures. Enter your answers numerically separated by a comma. ΜΕ ΑΣΦ Emin, Emax = Submit Request Answer Part B ? J Express your answers using two significant figures. Enter your answers numerically separated by a comma. Emin, Emax = Η ΑΣΦ ? eV Submit Request Answer