Could someone please help me with this as soon as possible?! I just need someone to walk me through how to solve it! Thank you! A 2.53 kg chunk of copper at -155°C is
dropped into 0.822 kg of water at
15.0°C. They cool to 0°C, and some
(but not all) of the water freezes to ice at
0°C. How much ice freezes?

(Unit = kg)

Two large, flat, horizontally oriented plates are parallel to each other, a distance d apart. half way betwween the two plates the electric field has magnitude e. if the separation of the plates is reduced to d/2 what is the magnitude of the electric field half way between the plates?

A1200 kg car traveling north at 10 m/s is rear-ended by a 2000 kg truck traveling at 30 m/s. what is the total momentum before and after the collision?

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.