Is the following chemical equation balanced? 2na + 2h 2 o 2naoh + h 2

Amachine, modeled as a simple spring-mass system, oscillates in simple harmonic motion. its acceleration is measured to have an amplitude of 5,000 mm/s with a fre- quency of 10 hz. compute the maximum displacement the machine undergoes during this oscillation.

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults