Acar can have no acceleration even if its moving
a. true
b. false

Positrons are spontaneously emitted from the nuclei of

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.