Hello I need some help with these 4 questions quickly if you could please help me out that would be great! 1- How many electrons must be removed to change the charge from +4.500 x 10-8 C to +8.000 x 10-8 C? 2- A 1.25 x 10-15 kg sphere is suspended midway between parallel plates that are 2.25 cm apart. The top plate is positive and the voltage is 480 V. What is electric field intensity between the plates? 3- A 1.05 x 10-15 kg sphere is suspended midway between parallel plates that are 2.65 cm apart. The top plate is positive and the voltage is 640 V. What is the charge on the sphere? 4- A transformer has 250 turns in the primary solenoid and 375 turns in the secondary solenoid. What is the primary voltage, if the secondary voltage is 240.0 V