A worker drives a 0. 500 kg spike into a rail tie with a 2. 50 kg sledgehammer. The hammer hits the spike with a speed of 65. 0 m/s. If one-third of the hammer’s kinetic energy is converted to the internal energy of the hammer and spike, how much does the total internal energy increase?.

Which of the following ideas did greek philosopher democritus contribute to the atomic theory? a. each object is made up of one atom, which varies in size from very small to very large. b. matter is composed of only one kind of particle, which can be easily destroyed. c. every element has a specific type of atom, which remains the same size in all forms of matter. d. all matter is composed of small particles, which combine to make larger objects.