First choice must have unit N/C. Second choice must have unit m. Third, fourth and fifth choices must have unit eV. The fifth drop down list has a possible choice "This proton cannot reach this height."

D Question 4 1 pts An infinitely large horizontal plane carries a uniform surface charge density n - -0.280 nC/m. What is the electric field strength in the region above the plane [Select ] ? A proton is traveling in this field with initial speed vo = 1.00 X 109 m/s at 0 = 30 angle with respect to the plane, as shown in the figure below. Use the coordinate system in the figure and neglect the effect of gravity. How high can the proton go [Select ] ? If the zero potential is at the origin level, i.e., y = 0 level, what is the potential energy [ Select ] and kinetic energy [ Select ] of the proton when it is at a height of y1 = 0.500 m ? What is the proton's kinetic energy at height y2 = 1.00 m [ Select ] Vo X O 1 pts