Which equation is balanced?

H2 + O2 + H2O + O2

H2 + O2 + H2O

2H2 + O2 + 2H2O

4H2 + O2 + H2O + O

Why do astronomers think that the milky way is a spiral galaxy?

It is best to say that marine debris

Why is the metric system preferred as the system of measurement by the scientific community? Select all that apply. 1. data is easily communicated worldwide 2. has prefixes that correspond to an amount to use with all base units 3.

A 115-turn circular coil of radius 2.71 cm is immersed in a uniform magnetic field that is perpendicular to the plane of the coil. During 0.133 s the magnetic field strength increases from 50.1 mT to 90.5 mT.

two ice skaters push each other, and move in opposite directions. the mass of one is 75 kg, and his speed is 2 m/s. if the mass of the other is 30 kg, what is her speed?

How far away is a train if you see the steam from it's nozzle 5sec before you hear it's sound (take the speed of sound is 331m/s)

Scientific work is currently underway to determine whether weak oscillating magnetic fields can affect human health.

When a force causes an object to move in the direction of the force blank occurs

Match the term to its description. Ammonia Read Answer Items for Question 1 Nitrogen gas Read Answer Items for Question 1 Nitrification Read Answer Items for Question 1 Lightning and bacteria Read Answer Items for Question 1 Eutrophication Read

How do you graph motion in physics? How do you graph motion in physics? I've seen problems state that an object is in free fall or that it was thrown upward and hits the ground, but I don't know how to graph them.