Four protons (each with mass 1.7 × 10-27 kg and charge 1.6 × 10-19 c) are initially held at the corners of a square that is 6.2 × 10-9 m on a side. they are then released from rest. what is the speed of each proton when the protons are very far apart? (you may assume that the final speed of each proton is small compared to the speed of light.)

explanation: magnetic pole, region at each end of a magnet where the external magnetic field is strongest. the south-seeking pole, or any pole similar to it, is called a south magnetic pole. unlike poles of different magnets attract each other; like poles repel each other.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

490 n

f=125n a=2.5m/s2