Find the velocity of an electron emitted by a metal whose threshold frequency is 2.03x1014 s-1 when it is exposed to visible light of wavelength 4.85x10-7 m. m/s

How fast must a 132 g baseball travel in order to have a de Broglie wavelength that is equal to that of an x-ray photon with A = 100. pm? 4.0 m/s

A metal surface has a threshold energy of 225 kJ/mol. After being exposed to light with frequency 7.3 × 1014 Hz , with what velocity will electrons be ejected?

Compare the de Broglie wavelength of an electron moving at 1.30x107 miles per hour (5.81x106 m/s) to that of a golf ball moving at 70.0 miles per hour (31.3 m/s) and a proton with a speed of 1.30x107 miles per hour (5.81x106 m/s). Particle Mass (kg) electron 9.11 × 10-31 golf ball [Review Topics] [References] Use the References to access important values if needed for this, question. proton Submit Answer 0.0450 1.67 × 10-27 Velocity (m/s) Wavelength Region 5.81 X 106 Retry Entire Group 31.3 5.81 × 106 9 more group attempts remaining Previous IS. Next Save and Exit

A silicon (Φ = 7.77 × 10-19 J) surface is irradiated with UV radiation with a wavelength of 195 nm. Assume an electron was a mass of 9.11 x 10-31 kg. What is the frequency of incident radiation?  What is the speed of emitted electrons?  What is the kinetic energy of emitted electrons?  What is the wavelength of the emitted electrons?

In Einstein's photoelectric experiment, the kinetic energy (K.E.) of an electron displaced from a metal by a photon was the difference in energy between the photon and a threshold energy value for the metal. If you were to perform a similar experiment with the metal silver, which has a threshold energy of 7.43 × 10⁻¹⁹ J, and ultraviolet light of wavelength 45.5 nm, what would be the speed (v) of the dislodged electron in meters per second? (K.E. = 1/2mv². The mass of the electron = 9.109 × 10⁻³¹ kg.)