The electron affinity of thulium has been measured by a technique known as laser photodetachment electron spectroscopy. in this technique, a gaseous beam of the anions of an element is bombarded with photons from a laser. electrons from the anion are then ejected and their energies are detected. the incident radiation had a wavelength of 1064 nm, and the ejected electrons were found to have an energy of 0.137 ev. the electron affinity is the difference in energy between the incident photons and the energy of the ejected electrons. determine the electron affinity of thulium in units of electron volts per atom.

1.in one challenge on the titan games, competitors have to lift 200 pounds up a long ramp. angel is able to move the weight in 42 seconds. anthony gets it done in only 38 seconds. which statement is true? angel has more power than anthony. angel does more work than anthony. anthony does more work than angel. anthony has more power than angel. 2.a mountain climber exerts 41,000 j of work to climb a cliff. how much power does the climber need if she wants to finish in only 500 seconds? power = work / time 20,500,000 watts 82 watts 0.0122 watts 41,500 watts 3.your family is moving to a new apartment. while lifting a box 83 joules of work is done to put the box on a truck, you exert an upward force of 75 n for 3 s. how much power is required to do this? (hint: you only need two of the 3 numbers given! ) power = work / time 249 watts 25 watts 2075 watts 27.7 watts

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

The mini-refrigerator fire was most likely caused by what type of wiring?