Influenced by the gravitational pull of a distant star, the velocity of an asteroid changes from from +19.7 km/s to −19.4 km/s over a period of 1.95 years. (a) What is the total change in the asteroid's velocity? (Indicate the direction with the sign of your answer.)

(b) What is the asteroid's average acceleration during this interval? (Indicate the direction with the sign of your answer.)

In which of the following cases is work being done on an object? question 2 options: pulling a trailer up a hill carrying a box down a corridor suspending a heavy weight with a strong chain pushing against a locked door

Three charge are arranged as shown in the diagram. the magnitude of the net electrical force acting on the +6 uc charge, rounded to the tenths place, is .

Match each vocabulary term to its definition. 1. electrons neutral subatomic particles found in the nucleus of the atom 2. neutron lowest energy position of an electron in an atom 3. photon the path of an electron around the nucleus of an atom 4. ground state negatively charged, subatomic particles 5. protons packet of energy of specific size 6. element substance with only one type of atom 7. orbital positively charged, subatomic particles found in the nucleus of the atom