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.

heat the gas and measure the pressure

which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?  

answer

a 75kg dining table

where is the photo and the answer choices?

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.