Use the Talk Test to check the safety level of your cardiovascular activity. Reflection Questions: Did you pass the Talk Test during this activity? If yes, could you talk while exercising for the whole activity? If no, what did you do to safely lower your exercise level? What benefits do you think you are getting by doing this activity? Warm-up: Cardiovascular Activity 2: Cool-down:

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.