1. A jogger does 3.45 E 6 J of work and gives off 1.67 E 6 J of heat. What is the change in her internal energy? Show your work. 2. What happens to the speed of molecules as you increase the temperature? Is air a good conductor of thermal energy? Why or why not? Name three examples of how convection heats the Earth.
3.What form of thermal energy transfer keeps our planet at a temperature that can support life?
4.You are standing next to a campfire. Do you get warmer because of conduction, convection, or radiation?
5. Describe a feature in a home that prevents heat loss by: Conduction Radiation Convection

Comedians like to joke that the reason we haven’t been visited by intelligent life from elsewhere in the universe is that aliens have been monitoring earth’s broadcasts of intellectually embarrassing tv programs, like gilligan’s island, fear factor, the jersey shore, and the jerry springer showand so consider us far too primitive to merit a visit. let’s check the assertion that aliens could have been receiving them. tv programs are broadcast at a frequency of about 100mhz with about 100kw of total power in 30frames per second, which emanatesroughly uniformly in all directions. assume that interstellar space transmits these broadcasts without attenuation. no matter how smart they are, aliens would require at least one photon per frame to interpret our signals. findthe number of photons per unit time per unit area reaching a receiver on a possible planet in the nearest star system, which is about 4 light-years away (a light-year is the distance light travels in a year). if aliens aimed a receiver or detector directly at earth, how big (in diameter) would it have to be to receive a photon per frame

Which subatomic particle has a negative charge

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.