At room temperature of 30 degree celsius, a glass of water takes one minute to cool from 80 degree celsius to 60 degree celsius. how long will it take to further cool from 60 degree celsius to 50 degree celsius?

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.