Chapter 8, Problem 8.13E

What is Kinetic energy?

Calculate the total electrical energy consumed for a load usage of 6 lamps (20 watts each) for 5 hrs a day. Total Electrical Energy consumed per day in watt hours=

Over the course of 6 months, a star’s parallax angle is measured to be 0.083 arcseconds. What is the distance to the star?

Neutrons cause more damage than gamma rays, although both are neutral and have large ranges. Why?

How are high-power plasma torches cooled?

In what direction does a solid exert force?

Approximately how long would it take a 50/50 mixture of oxygen and acetylene to flash back through a 21-ft-(7.62-m) long hose?

QUESTION 2 The three lowest energy levels of a hydrogen atom are -13.6 eV, -3.4 eV, and -1.5 eV. Assume that there is only one way to occupy any one of these levels. Calculate the relative probability that a hydrogen atom in thermal equilibrium in a star, at temperature T = 9493 K, is in its first excited state (at -3.4 eV) relative to its ground state (at -13.6 eV). Write your answer in exponential form. Recall that Boltzmann's constant can be written as 8.617 x 10-5 eV K-1

Describe the thermal radiation.