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

1. The speaker uses needles from two trees native to Florida Georgia Alabama 2. How many measurements did the speaker make of each needle type? -) eight ten twelve 3. The speaker reduced human error by the measurements. repeating rounding

Which best describes the motion of air particles when a transverse wave passes through them? A. The particles move both perpendicular and parallel to the direction of the wave. B. The particles follow the motion of the wave. C.

Suppose an electron is moving with a constant velocity until it encounters a positively charged sphere on its right. How does the sphere alter the trajectory of the electron? a. It has no effect on the trajectory of the electron b.

A mass spectrometer is being used to separate common oxygen-16 from the much rarer oxygen-18, taken from a sample of old glacial ice.

The Texas fight for independence was led by Sam Houston. true false?

What is the unit for force we use when calculating F=ma?

A vector of magnitude 20 is added to a vector of magnitude 25. The magnitude of this sum. might be:. A. zero. B. 3. C. 12. D. 47. E. 50

Calculate the gravitational potential energy of a 10kg box on the top shelf of a closet, 2m above the floor

In late adulthood, changes in memory may bot be inevitable however, any decline in memory tends to invite

On october 15, 2001, a planet was discovered orbiting around the star hd 68988. its orbital distance was measured to be 10.5 million kilometers from the center of the star, and its orbital period was estimated at 6.3 days.