Recall from chapter 1 that a watt is a unit of en- ergy per unit time, and one watt (w) is equal to one joule per second ( j·s–1). a 100-w incandescent light- bulb produces about 4% of its energy as visible light. assuming that the light has an average wavelength of 510 nm, calculate how many such photons are emit- ted per second by a 100-w incandescent lightbulb.

Suppose while hauling rocks, you accidentally drop one. it breaks apart in flat, planar sections. what type of rock did you just drop? 20 points

When temperature of a substance increases, of its particles increase resulting in more between particles. real world applications of thermal expansion absolute zero (-273 degrees c) is the lowest possible temperature on the kelvin scale. it is a measure of where a substance has no kinetic energy. heat is a process of the . energy flows spontaneously from a object to a until equilibrium is reached. heat is measured in heat is transferred throughis a method of heat transfer that occurs between particles of matter that are in direct contact with each other. are poor conductors that impede / reduce the rate of heat transfer. is a method of heat transfer that occurs in fluids (non-solids) by means of currents. real world application of convectiona method of heat transfer through electromagnetic waves. when energy moves from one object to another inside a closed system, no energy is or in the system in the transaction. systems will spontaneously move to a state of organized energy or high disorder over time called

In which type of system is power held solely by the central government and not shared with regional governments? group of answer choices federal unitary confederate oligarchic