"how long would it take for a ball dropped from the top of a 400-foot building to hit the ground? round your answer to two decimal places."

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?

What are the necessary conditions for fusion?

Along wire carrying a 4.2 a current perpendicular to the xy-plane intersects the x-axis at x=−1.7cm. a second, parallel wire carrying a 3.0 a current intersects the x-axis at x=+1.7cm. part a at what point on the x-axis is the magnetic field zero if the two currents are in the same direction? express your answer to two significant figures and include the appropriate units.