um..I have answers given but I have don't understand how to get them,,.
1. How many free electrons are in a raindrop of diameter 0.5cm, assuming each molecule of water in a raindrop donates one electron?
answer - 2.19x10^21 electrons
2.Five equal charges Q = 6.4 x 10^-19C are equally spaced on a semicircle or radius R = 0.10 meters. Find the force on a charge q = 3.2 x 10^-19 C located at the center of the semicircle.
answer - Felectrostatic = 4.45 x 10^-25N
3. Four point charges equal magnitude 6.4 x 10^-19 are placed on the corners of a square with side length a = 10cm. Calculate the electric field at P, the center of the square, if q1 and q4 are positive and q2 and q3 are negative.
answer - E = 1.63 x 10^4 N/C
4. Tow large parallel copper plates are 5.0cm apart and have a uniform electric field, E = 12000 N/C, between them as shown. An electron is released from the negative plate at the same time that a proton is released from the positive plate. Which particle reaches the attracting plate first? how much soon does it arrive?
answer - â–³t = 2.88 x 10^-7 s
and this one has picture that + plate is on left side and arrow of E going pointing right side which is the negative plate
Please help me ã…*_ã…*
1. How many free electrons are in a raindrop of diameter 0.5cm, assuming each molecule of water in a raindrop donates one electron?
answer - 2.19x10^21 electrons
2.Five equal charges Q = 6.4 x 10^-19C are equally spaced on a semicircle or radius R = 0.10 meters. Find the force on a charge q = 3.2 x 10^-19 C located at the center of the semicircle.
answer - Felectrostatic = 4.45 x 10^-25N
3. Four point charges equal magnitude 6.4 x 10^-19 are placed on the corners of a square with side length a = 10cm. Calculate the electric field at P, the center of the square, if q1 and q4 are positive and q2 and q3 are negative.
answer - E = 1.63 x 10^4 N/C
4. Tow large parallel copper plates are 5.0cm apart and have a uniform electric field, E = 12000 N/C, between them as shown. An electron is released from the negative plate at the same time that a proton is released from the positive plate. Which particle reaches the attracting plate first? how much soon does it arrive?
answer - â–³t = 2.88 x 10^-7 s
and this one has picture that + plate is on left side and arrow of E going pointing right side which is the negative plate
Please help me ã…*_ã…*