You bicycled for 3 hours and traveled 18 miles. What is your average speed?

5. Air enters a turbine operating at steady state at 8 bar, 1400 K and expands to 0.8 bar. The turbine is well insulated, and kinetic and potential energy effects can be neglected.

T Object]User: Which of the following does not affect the electrical resistance of a body? A. Material composing the body B. Temperature of the body C. Length of the body D. Bodies directly surrounding the body

After walking across a carpet, a boy feels a spark between his hand and a doorknob. If the boy's hand is negatively charged just before he touches the doorknob, which particles moved from the carpet to his hand (Chose one of the answers below) A

100 drops of oil fell from the burette. The first and final reading we're 28.6 cm cubed and 31.1 cm cubed. What is the average volume of the oil.

We have a heat engine that produces 150 J of heat, does 40 J of work, and emits 110 J into another system. What is the efficiency of the heat engine? (show you work)

If a car engine burns an equivalent of 20,000 joules of energy and attains a kinetic energy of 5,000 J, how much energy is dissipated in the form of heat?

If the speed of light in a vacuum is twice that of the speed of light in a given material, what is the index of refraction for that material?

In an electric motor, the rotating coil of wires wrapped around an iron core is a (n)

Which of the following best explains why the end of a spoon sticking out of a cup of hot water also gets hot? The hot water causes a chemical reaction to take place in the spoon.

Which of the following is an example of a research topic that is too broad? A. All about hip-hop music B. Hip-hop and the voice of outrage C. Rhyme and meter in hip-hop music D. Block parties and the origins of hip-hop