Answer:
B
Explanation:
nothing to do with black holes creating star or related
Answer:

Explanation:
In all atoms, the number of protons = number of electrons, as a result the atom is neutral. Losing or gaining electrons will make the atom electrically charged and we call an electrically charged atom an ion.
Ca 2+ would be the symbol because losing two negative electrons makes calcium's nucleus more positive by two protons.
Answer:A
Explanation: search for a gap in traffic and adjust your speed to the speed of the traffic.
Answer: B
Explanation:
The equation to find momentum is velocity*mass. Without velocity, there would be no momentum. Therefore the object CAN NOT be at rest.
Answer:
False.
Explanation:
Kinetic energy means it must move