The first excited state of a mercury atom is above the ground state. a moving electron collides with a mercury atom, and excites the mercury atom to its first excited state. immediately after the collision the kinetic energy of the electron is . what was the kinetic energy of the electron just before the collision?

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

If the wheels lock when braking suddenly the vehicle: a: loses traction b: lose steering wheel ability c: gain speed slightly d: gain steering ability

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !