What coefficients would balance the following equation?

__Al + __O2 → __Al2O3

A. 2Al + 3O2 → 1Al2O3

B. 2Al + 3O2 → 2Al2O3

C. 3Al + 3O2 → 2Al2O3

D. 4Al + 3O2 → 2Al2O3

Which statement is true because of Newton's second law? When the net force on an object decreases, the object's acceleration increases.

Jogger A has a mass m and a speed v, jogger B has a mass m/3 and a speed 3v, jogger C has a mass 4m and a speed v/3, and jogger D has a mass 3m and a speed v/2. Rank the joggers in order of increasing kinetic energy. Indicate ties where appropriate.

A worker does 25 J of work lifting a bucket, then sets the bucket back down in the same place. What is the total net work done on the bucket? a. - 25 J c. 25 J b. 0 J d. 50 J

As a bike accelerates from rest, it gains

Which sets of data show a wave with the shortest wavelength? A. Speed=100 million m/s and frequency = 50 million Hz. B. Speed=150 million m/s and frequency=1500 Hz C. Speed=300 million m/s and frequency = 100 Hz

A motorist driving at 25 meters/second decelerates to 15 meters/second. The combined mass of the vehicle and the driver is 1.5 * 10³ kilograms. What is the amount of mechanical work done by the vehicle?

All forces are different each exerts a particular type of effect on an object

Witch statement about polymers is true

Two bullets have masses of 3,0 g and 6.0g, respectively. both are fired with a speed of 40.0 m/s. Which bullet has more kinetic energy? What is the ratio of their kinetic energies

What does it mean that a form of energy might take more energy to harness than it provides? Are renewable resources always renewable, or can they become non-renewable? Why aren't renewable resources used for everything that we use energy for?