The reaction equation below shows the formation of aluminum oxide. Which set of coefficient balances the equation?

Al+O2? Al2O3

A) 1,1,1

B) 2,3,5

C) 2,4,5

D) 4,3,2

How do galaxies vary?

Consider equal volumes (say 1 l of a given substance in the solid, liquid, and gas phases. arrange them in order of decreasing mass based on the trend for the average substance.

What is nuclear radiation?

A rock weighing 98 newtons is pushed off the edge of a bridge 50 meters above the ground. What was the potential energy of the rock before it began to fall?

Supertasters" is a term used to refer to people who are born with more taste buds than the average person.

An iron railroad rail is 800 ft long when the temperature is 31°C. What is its length (in ft) when the temperature is - 17°C?

How does the lever arm change if you decrease the angle of the force?

Why does changing the shape of an object have no effect on the density of that object?

2. Vehicle-braking distance is the distance your vehicle travels after you see a problem before you apply the brakes. A. true B. false

On a sky coaster (human pendulum) that reaches 10 meters from it's equilibrium position, a man of 120 kg is able to reach a maximum speed of 18m/s 14m/s 1200m/s 11m/s