You have a piece of copper wire and a piece of carbon rod, each 1.5 m long and each having a cross-sectional area of 8.0 × 10−6 m2. When you connect the copper wire to the terminals of a 9.0-V battery, the current in the wire is I. Part A If you want to connect the carbon rod to another battery and have the same current I in the wire, what must the potential difference of the battery be? [ σcopper = 5.9 × 107 A/(V⋅m), σcarbon = 7.3 × 104 A/(V⋅m) ]

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.

Acold front traveling southeast collided with a warm front traveling northwest the following map shows the weather on monday the day the two fronts collided which of these describes the weather forecast for mississippi on tuesday and wednesday

In the united states, tornadoes generally occur because of the freezing of ocean water underwater earthquakes meeting of cool and warm air masses shifting of warm and cool ocean currents