A0.300-kg block along a horizontal track has a speed of 1.20 m/s immediately before colliding with a light spring of force constant 4.40 n/m located at the end of the track. (a) what is the spring's maximum compression if the track is frictionless?

Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j